What is asthma?

What brings about?

Asthma is a chronic lung disease.

Asthma is a chronic lung disease that inflames and narrows the airways, it is an obstructive syndrome in which air entrapment can be seen by bronchospasm.
This disease can cause recurring periods of wheezing (a whistling sound when you breathe), chest tightness, shortness of breath, and coughing.
Involved genetic factors are known and usually responds very well to bronchodilators.