Asthma is a chronic disease. With asthma, breathing is sometimes difficult due to these changes in the lungs:

  • Swelling of the lining in the airways
  • Tightening of the muscles around the airways (a spasm)
  • Extra mucus in the airways 

Asthma is not contagious. It is a lifelong disease which can be controlled with daily medications. Although asthma is a chronic disease, anyone with asthma can have an acute (sudden) attack of symptoms.

The breathing path explained. Normal airways and airways with bronchospasms.