Dr. El-Bershawi explains that COPD can be one of two major lung diseases—emphysema and chronic bronchitis—and he describes the symptoms of each condition which include shortness of breath and a productive persistent cough.
Smoking is the number one cause of COPD, although patients can also develop the disease due to other lung irritants such as long-term exposure to pollutants, second-hand cigarette smoke, and untreated asthma.
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