The Symptoms Lung Doctors Never Ignore

1. Persistent Cough

A cough that lingers for more than eight weeks is a symptom lung doctors take very seriously. While occasional coughing is common and often harmless, a persistent cough may indicate underlying lung problems that require medical attention.
Chronic bronchitis, a type of chronic obstructive pulmonary disease (COPD), is one notable example. This condition is characterized by a daily cough with mucus production that lasts for at least three months and recurs over two consecutive years. Such a cough may signal ongoing irritation or inflammation in the airways, potentially caused by smoking, air pollution, or other irritants.
It’s important to pay close attention to changes in your cough’s pattern. Notice if your cough becomes more frequent, produces different colored mucus, or is accompanied by other symptoms such as chest pain or shortness of breath.
Doctors stress that ignoring a persistent cough can allow serious conditions—like lung cancer or infections—to progress unnoticed. For more information on chronic cough causes and when to seek help, visit the American Lung Association.

2. Coughing Up Blood (Hemoptysis)

Coughing up blood, known medically as hemoptysis, is a symptom that lung doctors never overlook. Even small traces of blood in sputum can be alarming and are considered a significant warning sign, indicating possible serious lung or airway conditions.
One of the most concerning causes of hemoptysis is lung cancer. For instance, a patient who develops a new cough producing blood-tinged sputum may be experiencing the first visible symptom of a lung tumor disrupting blood vessels in the airways. However, hemoptysis can also result from infections like tuberculosis, bronchiectasis, or severe pneumonia.
Regardless of the underlying cause, the presence of blood in the sputum always warrants immediate medical evaluation. A prompt and thorough assessment—including imaging and laboratory tests—can help identify the source of bleeding and guide urgent intervention if needed.
Doctors emphasize that waiting or dismissing this symptom can be dangerous, as hemoptysis may signal life-threatening conditions. For a comprehensive overview of hemoptysis and its causes, visit the Cleveland Clinic.

3. Shortness of Breath (Dyspnea)

Shortness of breath, or dyspnea, is a symptom that lung specialists regard as potentially serious—especially when it appears suddenly or is progressive. This sensation can result from several mechanisms, such as airway obstruction, inflammation, or impaired gas exchange in the lungs. Conditions like asthma, for example, can cause abrupt airway narrowing, leading to wheezing and a desperate feeling of not getting enough air.
During an asthma attack, the muscles around the airways tighten, and the lining becomes swollen, making it difficult for air to flow in and out. However, dyspnea can also signal other problems, including chronic obstructive pulmonary disease (COPD), pneumonia, heart failure, or even blood clots in the lungs (pulmonary embolism).
Lung doctors urge anyone experiencing new, unexplained, or worsening shortness of breath to seek medical evaluation right away. Ignoring this symptom can result in rapid deterioration and, in severe cases, be life-threatening. For more about the causes and urgency of shortness of breath, consult the National Heart, Lung, and Blood Institute.

4. Chest Pain

Chest pain is a symptom that always raises concern among lung doctors, especially when it is sharp, persistent, or occurs with breathing or coughing. Unlike cardiac chest pain, lung-related chest pain often worsens when taking a deep breath or coughing, and it can be a sign of serious conditions such as infections or blood clots in the lungs.
For instance, pneumonia frequently presents with pleuritic chest pain—sharp discomfort that intensifies with inhalation. This type of pain can also result from pleurisy (inflammation of the lung lining) or even a pulmonary embolism, where a blood clot blocks a lung artery and reduces oxygen supply. Both require urgent diagnosis and treatment to prevent complications.
Doctors emphasize that unexplained chest pain, especially when paired with symptoms like shortness of breath, fever, or coughing up blood, should never be ignored. Prompt medical evaluation can be life-saving, as early intervention improves outcomes for many lung conditions. To learn more about chest pain related to lung disease, visit the Johns Hopkins Medicine resource.

5. Wheezing

Wheezing is a distinctive high-pitched whistling sound that occurs when air flows through narrowed airways. Lung doctors pay close attention to this symptom because it signals an obstruction or constriction within the respiratory passages. The narrowing may result from inflammation, excess mucus, or muscle spasms lining the airways.
Asthma is a classic example of a condition that causes wheezing. During an asthma flare, the airways become inflamed and tighten, making it difficult for air to move in and out of the lungs—producing the characteristic wheeze. However, wheezing can also occur with other conditions, such as allergic reactions, bronchitis, or chronic obstructive pulmonary disease (COPD).
It is especially important to note any new or sudden onset of wheezing, particularly if it is accompanied by shortness of breath or chest tightness. In some cases, sudden wheezing could indicate a medical emergency, such as a severe asthma attack or a foreign object blocking the airway.
According to the Centers for Disease Control and Prevention, anyone experiencing unexplained or recurrent wheezing should seek prompt evaluation, as early diagnosis and treatment can prevent complications.

6. Unexplained Weight Loss

Significant, unintentional weight loss is a red flag that lung doctors take seriously, as it can signal underlying chronic lung disease or even cancer. When someone loses more than 5% of their body weight in six to twelve months without trying, it often points to an ongoing health issue that needs attention.
For example, a patient might notice their clothes fitting looser and the number on the scale dropping rapidly, despite no changes in diet or activity. In the context of lung disease, this type of weight loss can be due to increased energy expenditure from labored breathing, persistent infection, or the body’s response to cancer.
Lung cancer, in particular, is notorious for causing unexplained weight loss as a first or early symptom, sometimes before respiratory symptoms even become apparent. Chronic diseases like COPD can also lead to muscle wasting and reduced appetite.
Doctors advise seeking medical evaluation for any rapid or unexplained changes in weight, as early intervention can greatly improve outcomes. For more insight into the link between weight loss and lung conditions, consult the American Cancer Society.

7. Fatigue

Fatigue is a common but often overlooked symptom that can be a key indicator of underlying lung problems. When the lungs aren’t functioning properly and oxygenation is impaired, the body’s tissues and organs struggle to get the oxygen they need. This leads to persistent tiredness, even after a full night’s sleep.
The sensation of fatigue due to poor oxygen supply is sometimes compared to the exhaustion people experience with anemia, where the blood cannot carry enough oxygen to meet the body’s demands. In chronic lung conditions like COPD or interstitial lung disease, low energy levels often develop gradually and may be brushed off as aging or lifestyle issues.
However, ongoing unexplained fatigue should not be ignored, especially if it is accompanied by other symptoms such as shortness of breath, cough, or weight loss. Lung doctors stress that persistent tiredness, without a clear reason, may be a subtle sign of a serious respiratory disease or even lung cancer.
To learn more about the connection between lung health and chronic fatigue, visit the American Lung Association.

8. Night Sweats

Night sweats—episodes of intense sweating during sleep—can be an important clue pointing to underlying lung disease. While occasional night sweats may be harmless, persistent or severe episodes are often associated with infection or cancer. Lung doctors are particularly alert to this symptom because it frequently accompanies serious conditions that require prompt attention.
One classic example is tuberculosis (TB), a lung infection that often triggers drenching night sweats along with fever, cough, and weight loss. Night sweats can also occur with pneumonia or be an early warning sign of lymphoma or lung cancer. When the body’s immune system fights off infections or malignancies, it can cause fluctuations in body temperature, leading to excessive sweating at night.
It is important to document the frequency, duration, and severity of night sweats, especially if they persist for more than a few nights or are accompanied by other symptoms such as cough, fever, or unexplained weight loss. Early evaluation can lead to quicker diagnosis and better outcomes.
For more information about night sweats and their link to lung diseases, visit the Centers for Disease Control and Prevention.

9. Hoarseness

Hoarseness—characterized by a raspy or weak voice—can sometimes be more than just the result of a cold or overuse. Lung doctors pay close attention to persistent hoarseness, as it may indicate a problem deeper within the chest. One important cause is when tumors in the lung or airway press on the recurrent laryngeal nerve, which controls the muscles of the vocal cords.
For instance, a tumor in the upper chest, such as a Pancoast tumor or certain types of lung cancer, can compress this nerve, leading to a change in voice quality. This symptom may develop gradually and persist for weeks, often without obvious throat pain or infection. In rarer cases, infections, thyroid problems, or even trauma can affect the same nerve with similar results.
Doctors recommend seeking medical evaluation if hoarseness lasts longer than two weeks, especially if it’s accompanied by other symptoms like difficulty breathing, swallowing, or unexplained weight loss. Early assessment can help identify serious causes and improve outcomes.
For a detailed explanation of voice changes related to lung and airway disease, refer to the American Cancer Society.

10. Recurrent Respiratory Infections

Frequent bouts of pneumonia or bronchitis are a red flag for lung doctors, as they may signal an underlying problem with the lungs or immune system. While most people experience occasional respiratory infections, having multiple episodes within a year—especially requiring antibiotics or hospitalization—warrants further investigation.
Repeated lung infections can be caused by structural lung diseases, such as bronchiectasis, which makes it easier for bacteria to settle and multiply in the airways. In some cases, an undiagnosed immune disorder may be to blame. For example, a person experiencing recurrent pneumonias might later be found to have a condition like common variable immunodeficiency (CVID), which impairs the body’s ability to fight infection.
Doctors stress the importance of evaluating anyone with frequent respiratory infections to rule out conditions such as cystic fibrosis, COPD, or even early lung cancer. Early diagnosis can lead to targeted treatments that prevent further lung damage and reduce the risk of serious complications.
For more information about chronic or recurrent lung infections and when to seek help, visit the American Lung Association.

11. Swelling in Legs or Ankles

Swelling in the legs or ankles, known as peripheral edema, can be a subtle but significant symptom of lung disease, particularly when related to pulmonary hypertension. Pulmonary hypertension occurs when increased pressure builds up in the blood vessels of the lungs, often due to chronic lung conditions like COPD or interstitial lung disease. This pressure forces the right side of the heart to work harder, sometimes leading to right-sided heart failure.
A classic comparison is swelling caused by congestive heart failure, where fluid accumulates in the lower extremities because the heart cannot effectively pump blood. Similarly, with pulmonary hypertension, blood backs up in the veins, causing fluid to leak into surrounding tissues and resulting in visible swelling.
Lung doctors urge patients to pay close attention to any new or unexplained swelling in the legs or ankles, especially if it is accompanied by shortness of breath, fatigue, or chest discomfort. Prompt evaluation can help uncover the underlying cause and prevent further complications.
To learn more about the connection between lung disease, pulmonary hypertension, and leg swelling, visit the National Heart, Lung, and Blood Institute.

12. Blue Lips or Fingertips (Cyanosis)

Blue discoloration of the lips, fingertips, or skin—called cyanosis—is a critical sign of dangerously low oxygen levels in the blood. This symptom is an unmistakable red flag for lung doctors, as it indicates the body isn’t getting enough oxygen to vital organs and tissues. The bluish hue occurs when blood oxygen saturation drops below normal, depriving tissues of the oxygen they need to function.
Cyanosis can develop suddenly during a severe asthma attack, when airway narrowing severely limits airflow and oxygen uptake. It is also seen in advanced chronic lung diseases or acute events like pneumonia or pulmonary embolism. In children, blue lips may be a warning sign of a serious respiratory infection or congenital heart problem.
Doctors stress that the appearance of blue lips or fingertips is a medical emergency and requires immediate attention. If you or someone else develops cyanosis—especially alongside breathlessness, confusion, or rapid heart rate—call emergency services right away.
For a deeper understanding of cyanosis and its causes, see the MedlinePlus overview on low blood oxygen and blue discoloration.

13. Clubbing of the Fingers

Clubbing of the fingers is a physical change that lung doctors never ignore, as it can be a sign of chronic or serious lung disease. This condition involves the enlargement and rounding of the fingertips, often accompanied by the nails curving around the fingertips. The underlying cause is usually prolonged low oxygen levels in the blood, which stimulates changes in the small blood vessels and tissues of the fingers.
Finger clubbing is commonly seen in people with chronic lung diseases such as cystic fibrosis, interstitial lung disease, or lung cancer. For example, in cystic fibrosis, the thick mucus and chronic lung infections can reduce oxygen delivery over time, leading to this characteristic finger change. Clubbing can also occur in people with congenital heart defects or certain gastrointestinal diseases.
Doctors emphasize that if you notice changes in the shape of your fingers or nails—especially if accompanied by other respiratory symptoms—it’s essential to seek evaluation. Clubbing is rarely a normal variation and typically signals an underlying health issue that requires attention.
For more detail on the causes and significance of finger clubbing, refer to the Mount Sinai medical resource.

14. Chronic Mucus Production

Persistent production of phlegm or mucus is a symptom that lung doctors watch closely, as it can be a hallmark of chronic respiratory diseases. When mucus production lasts for a month or more, especially outside of a cold or allergy season, it often points to conditions like chronic bronchitis or chronic obstructive pulmonary disease (COPD). These diseases cause long-term irritation and inflammation in the airways, leading to excess mucus.
A classic example is the “smoker’s cough,” where a long-time smoker develops a daily cough with thick, sticky mucus. This cough may initially seem harmless, but over time, it reflects the airways’ response to constant exposure to smoke and toxins. Chronic bronchitis is diagnosed when mucus production is present most days of the month for at least three months in two consecutive years.
Doctors recommend monitoring both the type and volume of mucus. Changes in color, thickness, or frequency—such as yellow or green mucus, or an increase in amount—can signal infection or worsening disease. Seeking medical advice early can help prevent complications.
To learn more about chronic mucus production and its implications, visit the American Lung Association.

15. Frequent Morning Headaches

Frequent morning headaches are a subtle yet important symptom that lung doctors never dismiss, as they can indicate overnight breathing problems. When breathing is impaired during sleep, the body may not receive enough oxygen or may retain too much carbon dioxide, both of which can trigger headaches upon waking. This phenomenon is commonly seen in people with chronic lung disease or sleep-related breathing disorders.
Sleep apnea is a prime example. In this condition, the airway intermittently closes during sleep, causing repeated drops in blood oxygen and surges in carbon dioxide. These fluctuations can result in headaches that are most prominent in the morning and often improve as the day progresses. Chronic obstructive pulmonary disease (COPD) and severe asthma can also cause similar issues, especially if they disrupt nighttime breathing.
Doctors recommend paying attention to the timing and frequency of headaches. If you consistently wake up with headaches, especially if you snore loudly, feel excessively sleepy during the day, or have trouble breathing at night, a thorough evaluation is warranted.
For more on morning headaches and their link to respiratory health, see the Sleep Foundation.

16. Difficulty Climbing Stairs

Struggling to climb stairs or perform other everyday activities is often one of the earliest signs of lung trouble that doctors notice. Exertional breathlessness—shortness of breath that occurs with physical activity—can indicate lung problems long before symptoms appear at rest. This is because the body’s demand for oxygen increases during exertion, putting extra strain on the respiratory system.
While some breathlessness can be attributed to physical deconditioning or lack of exercise, a sudden or progressive inability to handle activities like climbing stairs, walking briskly, or carrying groceries should not be ignored. Lung diseases such as chronic obstructive pulmonary disease (COPD), pulmonary fibrosis, or even early heart problems can all present with exertional symptoms first.
Doctors recommend paying close attention to changes in your ability to perform routine activities. If you find yourself avoiding stairs, taking frequent breaks, or feeling unusually winded compared to your peers, it’s time to seek medical advice. Early intervention can prevent further decline and improve quality of life.
For more on recognizing and responding to exertional breathlessness, visit the British Lung Foundation.

17. Noisy Breathing (Stridor)

Noisy breathing, especially a harsh, high-pitched sound known as stridor, is a symptom lung doctors treat as urgent. Stridor occurs when airflow is partially blocked as it moves through the upper airways—such as the larynx or trachea—resulting in a distinctive, raspy noise that’s most noticeable during inhalation.
A common pediatric example is croup, a viral infection that causes swelling around the vocal cords and leads to a barking cough and stridor. In adults, stridor can result from allergic reactions, inhaled foreign objects, or tumors compressing the airway. Because the airway is narrowed, breathing can quickly become labored and, in severe cases, life-threatening.
Doctors emphasize that any new or sudden onset of noisy breathing should be evaluated without delay. Stridor can signal a partial obstruction that may worsen rapidly, so immediate medical assessment is critical—especially if accompanied by difficulty speaking, swallowing, or changes in skin color.
For more information about stridor, its causes, and when to seek emergency care, visit the Mount Sinai health resource.

18. Unexplained Fever

A persistent or unexplained fever can be an early sign of lung infection or underlying inflammation that lung doctors never dismiss. When the body fights infection or inflammation in the lungs, it often responds with a rise in temperature. This is a protective mechanism but can also indicate serious conditions if the fever lingers or is accompanied by other respiratory symptoms.
Pneumonia is a classic example, frequently presenting with fever, chills, cough, and shortness of breath. However, other lung conditions such as tuberculosis, lung abscess, or even inflammatory diseases like sarcoidosis may also cause unexplained fever. Sometimes, fever may be the only initial clue that something is wrong in the respiratory system—especially in older adults or those with weakened immune systems.
Doctors recommend tracking the duration, intensity, and pattern of fever. Noting whether it spikes at certain times or persists despite medication can help guide further evaluation and diagnosis. If a fever lasts more than a few days, or if it is associated with chest pain, cough, or difficulty breathing, professional assessment is crucial.
For more on the connection between fever and lung infections, see the Centers for Disease Control and Prevention.

19. Loss of Appetite

Loss of appetite is a subtle yet consequential symptom that lung doctors pay close attention to, particularly when it persists. Chronic lung diseases and cancers often cause systemic effects that can suppress hunger. This happens as a result of the body’s ongoing inflammatory response, increased energy expenditure, or the influence of disease-related chemicals called cytokines.
For example, lung cancer patients frequently report losing interest in food well before other symptoms become pronounced. In chronic conditions like COPD, the effort required to breathe and the associated fatigue can make eating seem like a burden. While appetite loss is also common in viral respiratory infections—like the flu or a severe cold—it tends to resolve within days as recovery begins.
Persistent or unexplained changes in appetite, especially when combined with other symptoms like weight loss, cough, or fatigue, should prompt medical evaluation. Early detection of appetite changes can be critical in identifying and treating underlying causes before they progress.
For further reading on appetite loss and its link to chronic illness, see the National Cancer Institute resource.

20. Chest Tightness

Chest tightness is a sensation of constriction or pressure in the chest that lung doctors take seriously, especially when it is new, persistent, or worsening. This symptom can arise from a variety of causes, including both respiratory and non-respiratory conditions. In the realm of lung health, chest tightness is commonly associated with asthma, where inflammation and muscle spasms in the airways make breathing feel restricted.
For instance, someone with asthma may describe their chest as feeling “squeezed” or “banded,” particularly during an asthma attack or when exposed to triggers such as allergens or exercise. While anxiety or panic attacks can also produce similar sensations, it’s vital not to dismiss chest tightness as merely stress-related—especially if it occurs with other symptoms like shortness of breath, wheezing, or coughing.
Doctors urge anyone experiencing new or worsening chest tightness to seek evaluation. Quick action can help identify underlying causes and prevent complications, whether from asthma, infections, or even more serious conditions like pulmonary embolism.
For more on chest tightness and its association with lung disease, refer to the Centers for Disease Control and Prevention.

21. Sudden Onset of Breathlessness

A sudden, severe episode of breathlessness is one of the most urgent symptoms lung doctors encounter. This acute shortness of breath can be a warning sign of a life-threatening condition like a pulmonary embolism—a blood clot that travels to the lungs and blocks blood flow. In such emergencies, the decrease in oxygen can occur within minutes, and rapid intervention is critical.
Consider a scenario where an otherwise healthy adult suddenly finds it nearly impossible to catch their breath, with or without chest pain. This frightening experience might also be accompanied by rapid heart rate, lightheadedness, or even fainting. In some cases, additional symptoms like coughing up blood or leg swelling might provide further clues to the underlying clot.
Doctors stress that sudden onset of breathlessness should never be ignored or attributed to anxiety, especially if it is unprovoked or unrelated to exertion. Immediate medical evaluation—often in an emergency setting—is crucial, as prompt treatment can be lifesaving.
For a detailed discussion on the signs and dangers of pulmonary embolism, visit the Centers for Disease Control and Prevention.

22. Difficulty Lying Flat (Orthopnea)

Difficulty breathing when lying flat—a symptom known as orthopnea—is a warning sign that lung doctors do not take lightly. People with orthopnea may only find relief by propping themselves up with extra pillows or by sleeping in a recliner. This occurs because lying flat redistributes fluid in the body, often worsening underlying heart or lung problems and making it harder for the lungs to expand properly.
Orthopnea is commonly linked to heart failure, where fluid backs up into the lungs when a person is horizontal. However, it can also signal chronic lung diseases like COPD, pulmonary fibrosis, or even sleep apnea. The inability to breathe comfortably while flat is a clue that the body is struggling to manage oxygen and blood flow efficiently.
Doctors recommend paying close attention to positional symptoms. If you notice you’re increasingly uncomfortable lying flat or find yourself waking up gasping for air, it’s important to seek medical evaluation. Documenting how many pillows you need or how symptoms change with position can help guide diagnosis.
For more information about orthopnea and its relationship to heart and lung health, visit the Verywell Health overview.

23. Noisy Mucus (Rhonchi)

Noisy, rattling breathing sounds—referred to as rhonchi—are a symptom that can reveal the presence of thick mucus or secretions in the larger airways. These sounds are often described as low-pitched, snoring, or gurgling noises that may change or clear with coughing. Lung doctors pay close attention to rhonchi because they are frequently a sign of airway obstruction from mucus buildup, making it harder for air to move freely.
A common cause of rhonchi is acute bronchitis, where inflammation and increased mucus production block airflow. Chronic conditions like COPD and bronchiectasis can also result in persistent noisy breathing due to ongoing mucus retention. Sometimes, rhonchi may be mistaken for simple congestion or ignored as a minor cold symptom, but persistent or new-onset noisy breathing should always be evaluated.
Doctors recommend seeking medical advice if you notice new or worsening rattling noises when you breathe, especially if accompanied by cough, fever, or shortness of breath. Early evaluation can help identify underlying infections or exacerbations and guide effective treatment.
For further information on rhonchi and their significance, visit the Cleveland Clinic resource.

24. Chronic Snoring

Chronic, loud snoring is more than just a nuisance—it can be a sign of underlying airway obstruction or sleep apnea, conditions that lung doctors carefully monitor. While occasional snoring is common and often harmless, persistent or disruptive snoring may indicate that the airway is being partially blocked during sleep, preventing normal airflow and leading to fragmented, poor-quality rest.
Unlike the soft snoring that many people experience when tired or congested, the snoring associated with sleep apnea is typically loud, frequent, and may be punctuated by pauses in breathing or gasping episodes. These interruptions in breathing can lower oxygen levels, strain the heart, and increase the risk of other health problems, including high blood pressure and daytime fatigue.
Doctors recommend assessment if you or a loved one develops new, unusually loud, or disruptive snoring—especially if it is accompanied by daytime sleepiness, morning headaches, or witnessed apneas. Early detection and treatment of sleep apnea can greatly improve overall health and quality of life.
For more information about chronic snoring and its relationship to sleep and lung health, see the Sleep Foundation.

25. Unintentional Sleepiness During the Day

Unintentional or excessive sleepiness during the day is a symptom that lung doctors never ignore, as it often signals inadequate oxygenation during sleep. When the lungs or airways are compromised, oxygen levels can drop at night, leading to poor-quality sleep and resulting in persistent drowsiness throughout the day. This is especially common in people with sleep-disordered breathing, such as obstructive sleep apnea.
Daytime sleepiness may present as difficulty concentrating, frequent dozing off, or an overwhelming urge to nap—even after a full night’s rest. Unlike ordinary fatigue from a busy lifestyle, this kind of sleepiness typically has no clear explanation and can severely impact daily functioning, work performance, and safety.
Doctors urge anyone experiencing new or worsening daytime sleepiness to seek medical evaluation, as it may be a sign of underlying respiratory or neurological disorders. Early diagnosis and treatment can prevent complications and improve quality of life.
For more about the connection between lung health, sleep, and daytime drowsiness, see the Sleep Foundation overview on excessive sleepiness.

26. Unexplained Drop in Exercise Tolerance

A sudden or gradual decline in exercise tolerance—meaning the ability to walk, run, or perform physical activity without undue fatigue or breathlessness—can be an early indicator of lung disease. When the lungs’ capacity to oxygenate the blood is compromised, even routine activities can become challenging. This symptom is often subtle at first, but lung doctors recognize it as a crucial warning sign.
Such a decline can also occur in cardiovascular problems, like heart failure or coronary artery disease, where the heart struggles to pump sufficient blood during exertion. However, when the limitation is primarily respiratory, people may notice they can’t keep up with peers, need longer rest breaks, or feel “winded” much sooner than before.
Doctors recommend tracking changes in stamina over time, noting whether you are able to complete the same activities as in the past without difficulty. If you find yourself avoiding physical tasks, or if your ability to exercise drops unexpectedly, it’s important to seek a professional evaluation.
For more on how changes in exercise tolerance can reveal underlying health issues, visit this American Lung Association guide to lung disease symptoms.

27. Swelling Around the Neck (Jugular Venous Distention)

Swelling or bulging of the veins in the neck, known as jugular venous distention (JVD), is a physical sign that lung doctors pay close attention to. JVD can indicate increased pressure in the veins returning blood to the heart, often resulting from right-sided heart strain. This strain is a common consequence of chronic lung diseases that elevate pressure in the pulmonary arteries—known as pulmonary hypertension.
For example, when chronic lung disease or a condition like pulmonary embolism causes pulmonary hypertension, the right side of the heart must work harder to pump blood through narrowed lung vessels. This extra effort can back up blood in the jugular veins, making them visibly distended when a person sits or lies at a slight angle.
Doctors recommend prompt evaluation if you notice swelling or prominent veins in your neck, particularly when accompanied by symptoms like shortness of breath, swelling in the legs, or fatigue. JVD is rarely a benign finding and usually signals an underlying problem with the heart-lung circulation that needs urgent attention.
For more on jugular venous distention and its link to heart and lung health, visit the Cleveland Clinic resource.

28. New or Worsening Asthma Symptoms

Sudden changes in asthma control—such as increased coughing, wheezing, chest tightness, or shortness of breath—require immediate attention from lung doctors. These changes may signal that asthma is no longer well-managed, that a new trigger is present, or that an infection or environmental factor is worsening inflammation in the airways.
Unlike the predictable flare-ups associated with seasonal allergies, new or rapidly worsening asthma symptoms often come with less warning and may not resolve with usual medications. For example, if someone finds their rescue inhaler is becoming less effective, or if they need to use it more frequently to get relief, this is a sign that the underlying inflammation is not under control.
Doctors stress the importance of reviewing asthma action plans and seeking evaluation if symptoms change unexpectedly. Adjustments in medication or further testing may be necessary to prevent dangerous exacerbations or asthma attacks. Early intervention helps keep the disease manageable and reduces the risk of emergency hospital visits.
For more about asthma symptom monitoring and when to seek medical help, visit the Centers for Disease Control and Prevention.

29. Rattling or Crackling Sounds (Rales)

Rattling or crackling lung sounds, known medically as rales, are a key finding that lung doctors never ignore during a physical exam. These sounds are best described as fine, popping, or crackling noises heard through a stethoscope, often at the end of inhalation. Rales suggest that fluid, pus, or inflammation is present in the small airways or lung tissue.
One of the most common causes of rales is pneumonia, where infection fills the alveoli with fluid and inflammatory cells. Another frequent cause is heart failure, where fluid backs up into the lungs due to the heart’s inability to pump effectively. Rales may also indicate conditions such as pulmonary fibrosis or acute respiratory distress syndrome (ARDS).
Doctors strongly advise prompt assessment if new crackling or rattling sounds are detected—especially if they accompany symptoms like fever, cough, or shortness of breath. Identifying the cause early is crucial for effective treatment and preventing complications.
For more on rales and their significance in lung and heart diseases, visit the Mount Sinai health library.

30. Unexplained Anxiety or Panic

Unexplained anxiety or panic can sometimes be more than a psychological phenomenon—it may also be a response to underlying breathing problems. Lung doctors recognize that sudden breathlessness, tightness in the chest, or a sensation of not getting enough air can directly trigger anxiety or even full-blown panic attacks. This creates a feedback loop, where anxiety worsens breathing and vice versa.
For example, someone with chronic obstructive pulmonary disease (COPD) or asthma may experience episodes where their breathlessness leads to overwhelming fear, rapid heartbeat, and sweating—classic symptoms of a panic attack. The distinction between anxiety as a primary mental health issue and anxiety secondary to respiratory distress is crucial for proper management.
Doctors recommend monitoring mental health closely in the context of breathing problems. If you notice new or worsening anxiety that is linked to changes in your breathing or occurs without a clear emotional trigger, it’s important to discuss this with a healthcare provider. Addressing both the physical and psychological aspects can significantly improve quality of life.
For more about the link between anxiety and respiratory symptoms, visit the American Lung Association.

31. Chronic Bad Breath (Halitosis)

Persistent bad breath, or halitosis, can be more than a dental concern—it may signal an underlying lung problem. While most cases of bad breath stem from poor oral hygiene, gum disease, or dietary factors, lung doctors know that chronic halitosis can also result from respiratory infections or lung abscesses. These infections produce foul-smelling pus or mucus, which can be expelled with cough or linger in the airways, leading to a distinctive, persistent odor.
For instance, someone with a lung abscess may notice their breath remains unpleasant despite meticulous oral care and regular dental visits. Unlike the transient bad breath caused by certain foods, dehydration, or skipped brushing, infection-related halitosis persists and often worsens over time.
Doctors recommend evaluation if bad breath does not improve with improved oral hygiene or dental treatment, particularly when accompanied by other symptoms such as cough, fever, or chest discomfort. Early diagnosis can help identify infections or abscesses before they lead to more serious complications.
For more on the connection between halitosis and lung health, see the Cedars-Sinai resource on bad breath causes.

32. Increased Mucus Color Change

A noticeable change in the color of mucus—especially turning green, yellow, or rust-colored—is a classic warning sign that lung doctors never ignore. While clear or white sputum is typical for healthy airways or mild irritation, discolored sputum often signals infection or inflammation within the lungs. The presence of pus, dead cells, or blood in the mucus alters its appearance, alerting doctors to possible underlying issues.
For example, acute bronchitis or pneumonia frequently causes sputum to turn yellow or green, reflecting the body’s immune response to bacterial or viral invaders. Rust-colored mucus may indicate the presence of blood from a severe infection, such as pneumococcal pneumonia. In chronic lung diseases like COPD, a sudden shift in mucus color can signal an exacerbation or secondary infection.
Doctors advise patients to monitor not only the presence of mucus but also any changes in its color, volume, or consistency. Keeping track of these changes and reporting them to your healthcare provider can aid in early diagnosis and treatment.
For more information on sputum color and its significance in lung health, visit the American Lung Association.

33. Chronic Sore Throat

A sore throat that lingers for weeks or months deserves careful attention, as it may be more than just the aftermath of a viral infection. Lung doctors recognize that chronic throat pain can result from ongoing irritation due to postnasal drip—where mucus from the nose or sinuses drips down the back of the throat—or from gastroesophageal reflux disease (GERD), where stomach acid repeatedly irritates the throat lining.
Unlike the brief, self-limited sore throat of a cold or flu, chronic sore throat often develops gradually and is accompanied by symptoms such as hoarseness, frequent throat clearing, or the sensation of mucus in the throat. In some cases, persistent throat pain can also be a sign of chronic respiratory conditions or even a tumor compressing the upper airway.
Doctors recommend seeking medical evaluation if a sore throat persists beyond the typical duration of a viral illness (usually one to two weeks), especially if it is associated with difficulty swallowing, voice changes, or unexplained weight loss.
For more about chronic sore throat and its potential links to respiratory health, visit the Cleveland Clinic.

34. Sudden Voice Changes

Abrupt changes in the voice—such as sudden hoarseness, weakness, or complete loss of voice—are symptoms that lung doctors take very seriously. These changes may result from direct involvement of the nerves controlling the vocal cords, particularly the recurrent laryngeal nerve, or from tumors or growths within the chest or neck compressing these nerves.
A vivid example is laryngeal paralysis, where one or both vocal cords lose function due to nerve injury, pressure from a tumor, or even post-surgical complications. This can cause a breathy or weak voice, difficulty projecting, or a sudden inability to speak above a whisper. In some cases, sudden voice changes may also be accompanied by difficulty breathing or swallowing, raising concerns about airway compromise.
Doctors recommend urgent evaluation for any new, unexplained, or rapidly worsening voice changes. Such symptoms may indicate serious underlying problems—like a tumor, nerve damage, or infection—that require prompt diagnosis and intervention.
For a comprehensive overview of sudden voice changes and their link to respiratory and nerve conditions, consult the ENT Health resource.

35. Unexplained Dizziness or Fainting

Unexplained dizziness or fainting (syncope) can signal serious underlying lung or heart problems, especially when related to low blood oxygen levels. When the lungs are unable to efficiently deliver oxygen to the bloodstream—due to conditions like severe asthma, COPD, or a pulmonary embolism—the brain may temporarily receive less oxygen, resulting in lightheadedness or even loss of consciousness.
This mechanism is similar to dizziness caused by anemia, where a lack of healthy red blood cells reduces the blood’s oxygen-carrying capacity. However, with lung disease, the root of the problem lies in oxygen exchange rather than blood quantity. People may notice sudden dizziness when standing, climbing stairs, or during physical activity, sometimes accompanied by shortness of breath or palpitations.
Doctors strongly advise urgent evaluation for any new or recurrent episodes of fainting or unexplained dizziness. Such symptoms can warn of dangerous drops in oxygen levels or circulatory issues that require prompt diagnosis and treatment.
For more on the relationship between dizziness, fainting, and lung health, visit the Mount Sinai health library.

36. Unresolved Sinus Congestion

Chronic or unresolved sinus congestion isn’t just a nuisance—it can be a warning sign for more serious respiratory issues. Lung doctors know that persistent congestion often points to ongoing sinusitis, where inflammation or infection of the sinus cavities lasts for weeks or months. When left untreated, chronic sinus problems can contribute to postnasal drip, which irritates the throat and lower airways.
Over time, this constant drainage can lead to coughing, throat clearing, or even lower respiratory tract infections like bronchitis or pneumonia. People with allergic rhinitis, nasal polyps, or repeated sinus infections are at higher risk for developing chronic congestion that impacts the lungs. Unlike the temporary stuffiness of a common cold, unresolved sinus congestion lingers and may cause facial pain, pressure, and reduced sense of smell.
Doctors recommend evaluating any congestion that persists for more than ten days, especially if it is accompanied by thick nasal discharge, headaches, or worsening respiratory symptoms. Early intervention can prevent the spread of infection and reduce the risk of complications in the lungs.
For more on the link between sinus health and lung disease, visit the Centers for Disease Control and Prevention.

37. New or Worsening Allergies

The sudden development of new allergies or a marked worsening of existing allergic symptoms can be a sign of underlying airway inflammation, which lung doctors monitor closely. Allergic reactions in the nose, throat, or lungs trigger immune responses that inflame and swell the airways, making breathing more difficult and increasing susceptibility to infections or asthma.
Many people are familiar with predictable, mild seasonal allergies—such as sneezing, runny nose, and itchy eyes during spring or fall. However, when allergy symptoms become more severe, occur out of season, or begin to include coughing, wheezing, or chest tightness, it could indicate that respiratory health is being compromised. This can happen if chronic exposure to allergens like mold, dust mites, or pet dander triggers ongoing airway irritation.
Doctors encourage patients to keep a record of allergy symptoms, noting their frequency, severity, and any new or unusual patterns. Tracking these changes can help identify triggers and inform treatment strategies, reducing the risk of more serious lung involvement.
For more information about allergies and their impact on lung health, visit the Asthma and Allergy Foundation of America.

38. Frequent Nosebleeds

Frequent nosebleeds, or epistaxis, can sometimes be more than a simple nuisance. Lung doctors recognize that while occasional nosebleeds are often due to dry indoor air, allergies, or minor trauma, repeated episodes may point to deeper issues. Dry climates, use of indoor heating, or nasal sprays can dry out and irritate the lining of the nose, making it more prone to bleeding.
However, persistent or severe nosebleeds may signal underlying bleeding disorders, chronic infections, or even rare conditions that affect blood vessels in the respiratory tract. For example, infections can cause inflammation and fragile blood vessels, leading to easier bleeding. In rare cases, frequent nosebleeds could be related to conditions like hereditary hemorrhagic telangiectasia, which affects blood vessel integrity.
Doctors urge patients to seek medical evaluation if they experience nosebleeds more than once or twice a week, if bleeding is difficult to control, or if accompanied by other symptoms such as bruising or gum bleeding. Early assessment can help rule out serious causes and provide appropriate treatment.
For more on the causes and management of nosebleeds, visit the ENT Health resource.

39. Unusual Chest Sensations

Unusual sensations in the chest—such as tingling, burning, or prickling—deserve attention, especially when persistent or unexplained. Lung doctors note that these abnormal feelings can sometimes indicate nerve involvement, irritation, or inflammation in the chest wall or lungs. While many people are familiar with the discomfort of heartburn or muscle strain, sensations that are new, persistent, or difficult to describe can suggest more complex issues.
For instance, a burning sensation might be due to acid reflux (GERD) irritating the esophagus, but nerve involvement from a lung tumor or inflammation affecting the lining of the lungs (pleura) can also cause abnormal chest feelings. Tingling or numbness may result from nerve compression by enlarged lymph nodes, tumors, or even a herniated disc in the spine.
Doctors recommend keeping track of any new, unusual, or ongoing chest sensations, noting their intensity, duration, and any triggers. This information can help your healthcare provider identify whether the cause is benign or if further evaluation is needed.
For more on chest sensations and their possible causes, see the Cedars-Sinai overview on chest symptoms.

40. Decreased Mental Alertness

A sudden drop in mental sharpness or confusion can sometimes be traced to low oxygen levels, a situation lung doctors treat as urgent. When the lungs are unable to provide enough oxygen to the brain—due to severe asthma, pneumonia, COPD flare-ups, or advanced lung disease—mental function can quickly deteriorate. People may become disoriented, forgetful, or have trouble concentrating, even if they were previously alert.
This effect is comparable to what happens with dehydration or severe infections, where lack of fluid or systemic illness impairs the brain’s ability to function normally. However, confusion or decreased alertness due to respiratory causes often comes on rapidly and may be accompanied by other symptoms like shortness of breath, bluish lips, or increased sleepiness.
Doctors stress that any new or unexplained cognitive changes should be evaluated immediately. In older adults, confusion is sometimes the only early warning sign of a serious respiratory issue, as classic symptoms like cough or fever may be absent.
For more on how low oxygen can affect mental status and when to seek emergency care, see the Mount Sinai resource on confusion.

41. Unrelieved Hiccups

While hiccups are typically harmless and short-lived, persistent or unrelieved hiccups—lasting more than 48 hours—can signal a more serious problem. Lung doctors know that recurrent hiccups may result from irritation or inflammation of the diaphragm, the muscle separating the chest and abdominal cavities. This irritation can sometimes be caused by underlying lung issues.
For instance, a lung tumor near the base of the lung or inflammation from pneumonia can press on or irritate the phrenic nerve, which controls the diaphragm, leading to ongoing hiccups. Rarely, persistent hiccups can be a symptom of other serious conditions, such as pleurisy, pericarditis, or even a stroke. The key difference is duration—regular hiccups resolve quickly, while those linked to medical conditions linger and resist home remedies.
Doctors recommend seeking medical attention if hiccups last longer than two days, interfere with eating or sleeping, or are accompanied by symptoms like chest pain, shortness of breath, or unexplained weight loss. Prompt evaluation can identify underlying causes and guide appropriate treatment.
For more on persistent hiccups and their potential medical implications, visit the Cedars-Sinai hiccups guide.

42. Trouble Swallowing (Dysphagia)

Difficulty swallowing, or dysphagia, is a symptom that lung doctors take seriously—especially when it comes on suddenly or worsens over time. This issue can arise when tumors in the lungs, esophagus, or mediastinum (the central part of the chest) grow large enough to press on the esophagus, partially blocking the passage of food and liquids. As a result, swallowing may become uncomfortable, slow, or even painful.
While gastroesophageal reflux disease (GERD) is a common and usually benign cause of trouble swallowing—where acid reflux irritates the esophagus—persistent or progressive dysphagia can point to more serious problems. For example, a patient developing a cough or choking sensation while eating, coupled with unexplained weight loss, might have a tumor affecting the swallowing pathway.
Doctors emphasize the importance of prompt evaluation if swallowing difficulties persist, especially when accompanied by hoarseness, chest pain, or unintentional weight loss. Early investigation can identify the underlying cause, whether it’s an infection, inflammation, or mass, and enable timely treatment.
For more on dysphagia and its possible causes, see the American Cancer Society on lung cancer symptoms.

43. Persistent Humming or Vibrating in Chest

A persistent sensation of humming, buzzing, or vibrating in the chest is a symptom that can puzzle both patients and doctors. Lung specialists are attentive to such complaints, as these unusual feelings may arise from turbulent airflow caused by airway secretions, blockages, or even heart murmurs. For example, thick mucus in the airways—often seen in bronchitis or COPD—can create vibrations or a “fluttering” sensation as air moves past the obstruction.
Sometimes, a heart murmur or irregular heartbeat can transmit vibrations felt as a faint hum in the chest, especially during periods of exertion or anxiety. These sensations may be fleeting, but when they become persistent or are accompanied by cough, wheezing, or shortness of breath, they warrant careful evaluation.
Doctors advise patients to monitor and document any new or ongoing chest vibrations, noting their duration, triggers, and associated symptoms. This information can help healthcare providers pinpoint whether the sensation is related to respiratory, cardiac, or even neurological causes.
For more on unusual chest sensations and when to seek evaluation, see the Cleveland Clinic guide to chest symptoms.

44. Chronic Dry Mouth

Chronic dry mouth, or xerostomia, is more than just a discomfort—it can be a sign of underlying airway problems. Lung doctors recognize that persistent dryness often results when people are forced to breathe through their mouth rather than their nose, commonly due to chronic nasal blockage, sinus congestion, or allergies. Mouth breathing bypasses the natural humidification process of the nasal passages, causing the mouth and throat to become parched, especially overnight.
While dry mouth is also a well-known side effect of many medications—such as antihistamines, antidepressants, or blood pressure drugs—the key distinction is whether the dryness is linked to nasal or airway symptoms. People with chronic sinusitis, nasal polyps, or deviated septum may notice their mouth is dry upon waking or throughout the day, often accompanied by sore throat or hoarseness.
Doctors recommend addressing persistent dry mouth by evaluating for airway or nasal issues, rather than simply increasing fluid intake. Treatment of the underlying blockage or congestion can resolve both the dryness and improve overall breathing comfort.
For more on dry mouth and its relationship to airway health, visit the Mayo Clinic.

45. Chronic Ear Fullness or Pain

Chronic sensations of ear fullness or pain are symptoms that lung and ENT doctors never ignore, as they can signal ongoing issues within the upper airway. One common cause is eustachian tube dysfunction, which occurs when the small tube connecting the middle ear to the back of the throat becomes blocked. Chronic nasal congestion or persistent sinus infections often contribute to this problem, as inflammation and mucus prevent proper drainage and pressure equalization.
For example, someone with a long-standing sinus infection may notice a sensation of fullness, popping, or discomfort in the ears, sometimes accompanied by muffled hearing or tinnitus. Unlike the fleeting ear pressure experienced during airplane travel or altitude changes, chronic symptoms may persist for weeks or months and can lead to repeated ear infections or even temporary hearing loss.
Doctors recommend evaluation for persistent ear symptoms, especially when they don’t resolve with over-the-counter remedies or are associated with ongoing nasal congestion, postnasal drip, or sinus pain. Early intervention can prevent complications and restore normal ear function.
For more on eustachian tube dysfunction and its link to respiratory health, see the ENT Health guide.

46. Red or Painful Eyes

Red or painful eyes may not seem directly related to lung health, but lung doctors know that certain autoimmune diseases affecting the lungs can also trigger inflammation in the eyes. Conditions such as sarcoidosis or granulomatosis with polyangiitis can cause both lung and ocular symptoms, including redness, pain, and sensitivity to light. This is the result of the immune system mistakenly attacking tissues in multiple organs.
While mild redness and discomfort are common with allergies or minor irritants, autoimmune-related eye inflammation is often more severe and persistent. People may also notice blurred vision, excessive tearing, or even changes in eye appearance. If left untreated, this inflammation can threaten vision and signal ongoing disease activity elsewhere in the body, including the lungs.
Doctors strongly recommend assessment for unexplained or persistent eye symptoms, especially when accompanied by respiratory complaints, fever, or joint pain. Early diagnosis and coordinated care between pulmonologists and ophthalmologists are crucial for managing these complex conditions.
For more on the connections between lung disease and eye inflammation, see the National Eye Institute resource on uveitis and systemic disease.

47. Unexplained Sweating During the Day

Experiencing unexplained or excessive sweating during the day—when not exercising or in a hot environment—can be an important clue for lung doctors. While occasional sweating is normal, persistent or profuse day sweats may indicate underlying infection, inflammation, or metabolic stress. The body often responds to infection or chronic disease by raising its temperature and activating sweat glands to regulate heat.
A classic example is tuberculosis (TB), which can cause both night sweats and daytime sweating, often accompanied by fatigue, cough, and weight loss. Other lung infections, as well as certain cancers and autoimmune diseases, may also disrupt the body’s normal temperature control, resulting in abnormal perspiration.
Doctors recommend monitoring the pattern and frequency of sweating episodes, especially if they are associated with other symptoms like fever, chills, or malaise. Persistent or unexplained sweating should never be dismissed, as it may be the body’s way of signaling an ongoing illness that requires medical attention.
For more on the significance of unexplained sweating and its link to lung and systemic diseases, visit the Centers for Disease Control and Prevention guide to tuberculosis symptoms.

48. Chronic Nausea or Vomiting

Chronic nausea or vomiting is a symptom that lung doctors don’t overlook, as it can be an indirect sign of advanced lung disease or related complications. In severe respiratory conditions like chronic obstructive pulmonary disease (COPD) or pulmonary hypertension, the effort of breathing and lowered oxygen levels can disrupt the gastrointestinal system. This may lead to persistent queasiness, loss of appetite, or actual vomiting—especially after coughing fits or exertion.
Unlike the short-lived nausea seen with viral gastroenteritis, which typically resolves within days, gastrointestinal symptoms associated with lung disease tend to linger and may be aggravated by certain medications or oxygen therapy. For example, excessive coughing from chronic bronchitis can trigger the gag reflex and cause vomiting, and right-sided heart failure can lead to fluid buildup in the abdomen, resulting in discomfort and nausea.
Doctors recommend evaluation for ongoing nausea or vomiting, particularly if it occurs alongside respiratory symptoms, weight loss, or fatigue. Early recognition can help identify treatable causes and prevent complications like dehydration or malnutrition.
For further information on how lung conditions can impact digestive health, see the American Lung Association resource on diet and lung health.

49. Swelling in the Face or Neck

Swelling in the face or neck is an alarming symptom that lung doctors treat as a potential emergency. One of the most serious causes is superior vena cava (SVC) syndrome, a condition where the vein that carries blood from the upper body back to the heart becomes blocked or compressed. This can occur when a tumor—such as lung cancer or lymphoma—grows near the upper chest and presses on or invades the SVC.
A classic scenario involves a patient with undiagnosed lung cancer who suddenly develops noticeable puffiness or tightness in the face, neck, or even upper chest and arms. The swelling may worsen when lying down and can be accompanied by visible veins on the skin, shortness of breath, or difficulty swallowing. SVC syndrome can progress rapidly, leading to life-threatening complications if not addressed promptly.
Doctors stress the urgency of seeking immediate medical evaluation if you notice swelling in these areas, particularly if it comes on suddenly or is associated with breathing or swallowing difficulties. Early diagnosis and intervention are critical for relieving the blockage and preventing further complications.
For more on superior vena cava syndrome and related symptoms, visit the American Cancer Society.

50. Unexplained Recurrent Bronchitis

Experiencing bronchitis multiple times in a single year—or year after year—should not be dismissed as mere bad luck. Recurrent episodes of bronchitis, where the airways become inflamed and produce excess mucus, may signal an underlying chronic lung disease such as COPD, asthma, or bronchiectasis. Unlike the occasional bout of viral bronchitis that follows a cold and resolves with rest, repeated or lingering infections suggest that the airways are vulnerable and not functioning normally.
For example, someone who seems to get “every bug going around” and struggles with cough and mucus for weeks at a time may actually have a structural problem or a weakened immune system. Over time, these recurrent infections can cause permanent damage to lung tissue, making future infections even more likely and severe.
Doctors recommend seeking a specialist’s evaluation if you experience frequent bronchitis, especially if accompanied by shortness of breath, wheezing, or chest discomfort. Early diagnosis can help identify treatable conditions and prevent further lung damage.
For more about the causes and risks of recurrent bronchitis, visit the American Lung Association.

Conclusion

Recognizing and acting on the symptoms lung doctors never ignore can make a life-saving difference. Early identification of warning signs—ranging from persistent cough, unexplained weight loss, and shortness of breath, to more subtle changes like fatigue or chest sensations—enables timely diagnosis and treatment of potentially serious lung diseases.
If you notice any new, worsening, or unexplained symptoms, don’t delay. Schedule an appointment with your primary care provider or a lung specialist, and discuss the possibility of screening tests or a thorough respiratory evaluation. Being proactive can help catch problems early, improve treatment outcomes, and safeguard your long-term health.
For more information on lung health and screening, visit the American Lung Association resource.

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