Cough is a common symptom in people who have asthma, although it can occur for
many other reasons. It's generally a healthy reflex that helps clear the airways (the
tubes that carry air into and out of the lungs) in the throat and chest, but is often
also a sign of airway irritation, as is the case in a person with asthma. For many
children with asthma, a cough is their primary - and sometimes even their only - symptom.
But some people with asthma may only cough at night or while exercising.