"chronic obstructive pulmonary disease" is a broad term for the conditions of "chronic bronchitis, " which is coughing up phlegm every day, or "emphysema, " or destruction of lung tissue.
Both are most often associated with cigarette smoking. The cause shortness of breath, coughing, wheezing, chest tightness, and other symptoms. Mainly, this is because patients with COPD can't blow all the air out.
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