Assess your knowledge of the asthma basics with this quiz.

Chances are, you know someone who has asthma—or even have it yourself. This brief summary can serve as an introduction or a review of the facts about asthma.

When you have asthma, triggers can inflame the sensitive airways in your lungs. This inflammation makes the airways "twitchy" (even more sensitive to triggers). Your airways can then become so narrow that air has trouble getting in and out of your lungs. This is what causes the symptoms of an asthma flare-up.