What usually causes asthma?

Numerous reasons: In children asthma is often linked to allergies. As we age, exercise induced asthma , occupational asthma and attacks not related to allergies play a larger part. In addition, asthma is sometimes mistaken for something else. Get checked to make sure.

Genes/triggers: Those with true asthma will have genetic factors that predispose hypersensitive small airways and slowed response to their re-opening after tightening. They will also have a variety of specific triggers that can start an event.Children often wheeze with infection and grow out of the tendency.True asthma is a lifelong tendency.