Asthma (AZ-ma) is a chronic (long-term) lung disease that inflames and narrows the airways. Asthma causes recurring periods of wheezing (a whistling sound when you breathe), chest tightness, shortness of breath, and . The coughing often occurs at night or early in the morning.
Asthma affects people of all ages, but it most often starts during 人妻中出视频hood. In the United States, more than 25 million people are known to have asthma. About 7 million of these people are 人妻中出视频ren.