Asthma affects more than 22 million Americans. But what happens during a respiratory asthma attack? Learn the basics about asthma now....

Some people are more likely than other to be diagnosed with asthma. Learn if you are at risk of asthma in this section on risk factors and causes of asthma....

How can you identify the signs and symptoms of asthma or respiratory problems? We list the common asthma symptoms here and discuss asthma problems....