All about Asthma

Asthma is a disease of the lung airways. With asthma, the airways are inflamed (swollen) and react easily to certain “triggers,” like viruses, smoke, dust, mold, animal hair, roaches, or pollen. When the inflamed airways react, they get narrow and make it hard to breathe.
Common asthma symptoms are:

coughing, especially at night
wheezing — a whistling or [...]