Asthma

Asthma (AZ-ma) is a chronic (long-term) lung disease that inflames and narrows the airways. Disease symptoms  cause recurring periods of wheezing (a whistling sound when you breathe), chest tightness, shortness of breath, and coughing.

To understand asthma, it helps to know how the airways work. The airways are tubes that carry air into and out of your lungs. People who have asthma have inflammation within the airways. This inflammation makes the airways swollen and very sensitive, which tend to react strongly to certain inhaled substances.

When the airways react, the muscles around them tighten. This narrows the airways, causing less air to flow into the lungs. The swelling also can worsen, making the airways even narrower.  Symptoms can happen each time the airways are inflamed. 

Source: National Heart, Lung and Blood Institute. U.S. Department of Health and Human Services

 

* These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.