Program Health Topics Index Asthma Asthma is a chronic disorder with recurrent attacks of wheezing and shortness of breath. This decreases or closes off air to the lungs.
Some people have exercise-induced asthma.
Wheezing upon breathing out. Coughing, especially at night, occasionally with thick, clear or yellow sputum. Rapid, shallow breathing that is easier with sitting up. Inability to speak. Mental changes, including restlessness or confusion.