A condition in which a person's airways narrow, swell and produce extra mucus.

In asthma, the airways narrow, swell and produce extra mucus.

Asthma can make breathing difficult and trigger coughing, wheezing and shortness of breath. Asthma can be minor or interfere with daily activities. But in some people, it may lead to a life-threatening attack.

The condition usually can be controlled with medicines.