Asthma is inflammation and narrowing of the airways (called the bronchial tubes).
Find answers in our in-depth report on asthma:
Do you repeatedly cough, have a hard time breathing, and feel tightness in your chest during or after exercise? You may have execrise-induced asthma. Find out what it is and what you can do about it.
Asthma, like many chronic diseases, can adversely affect your sex life. But there are ways to cope with it and lessen its effects.
Learn about one woman's experience of living with asthma for 15 years.
A mother shares her story of what it's like to have a child with asthma.
and allergic rhinitis (hay fever) are among the major causes of illness and disability in the United States, affecting as many as 40-50 million Americans. Scientists do not know why certain people experience allergic reactions, but they do know that increased amounts of a substance called leukotrienes play an important role in causing symptoms.