12. Persistent or recurring pneumonia
This may seem counterintuitive. Isn’t a chest infection itself a problem with the lungs and not also a symptom of a different lung disease? While a recurring chest infection, such as pneumonia, is incredibly bothersome in itself, it could also signify a very worrying underlying condition. This condition is lung cancer.
A person who has cancer has a weakened immune system. This means that they are more prone to infections. This is where pneumonia comes in. Pneumonia is an infection and can be caused by fungal, viral, bacterial or chemical sources. The infection can take hold either if one of these sources has made their way past the nose and throat into the lungs or if they have spread to the lungs from another part of the body.
Symptoms of pneumonia include coughing, chest pain, wheezing, lethargy, appetite loss, excessive mucous production, and many others. Differentiating between pneumonia and lung cancer can be quite troublesome as there are many symptoms which are common to both. To aid in diagnosis, doctors generally evaluate risk factors. Smoking is the primary cause of lung cancer while a weakened immune system leaves one at risk for pneumonia. Children, the elderly and cancer patients have weakened immune systems.
It has been made clear that pneumonia and lung cancer can almost be indistinguishable from one another. The point here is then, that if a person is suffering from recurring bouts of pneumonia it might be time to test for an underlying condition. There may be a biological or environmental reason for their weakened immune system which has made them increasingly more susceptible to the infection, but it could also be lung cancer.