What Is Asthma?
Asthma is a disease of the airways in the lungs. When you have an asthma episode the sides of the airways in the lungs become thick and swollen with sticky mucus, making breathing difficult.
If an asthma episode is serious enough, you could die if not treated in time.
You cannot catch asthma from other people like a cold or flu, but you can develop it at any age. If you do have asthma, you should learn how to manage the disease (link: asthma control tips) properly.