
Asthma
During an asthma attack, the airways become constricted and excess mucus is produced in response to a trigger such as exercise, irritants, or allergies. This restricts breathing and oxygen delivered to the brain. An asthma attack can be a minor nuisance or a life-threatening event. Many people with asthma carry a quick-relief inhaler that will relieve symptoms. If used promptly when symptoms begin, the severity of the attack can often be reduced. However, if the inhaler is not helping or the person’s breathing is becoming rapidly worse, they require emergency treatment.