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 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.