Asthma is a chronic condition that causes difficulty with breathing. It affects more than 20 million people in the United States alone, and African-American and Hispanic individuals have the highest rates of chronic asthma. Also, those living in big cities are more likely to be affected.

Asthma symptoms can include coughing and wheezing, tightness or pressure in the chest, shortness of breath, rapid breathing, tightened neck and chest muscles, a pale and sweaty face, and bluish lips or fingernails.

While asthma cannot be cured, its triggers can be controlled. Careful management of the home environment can make a significant difference for asthma sufferers.

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