DEAR DOCTOR K: After years of smoking I've developed chronic bronchitis. Every morning I cough up lots of mucus. What can I do to control this cough?
DEAR READER: Chronic bronchitis is a common form of chronic obstructive pulmonary disease, or COPD. COPD refers to a group of disorders that damage the lungs and make breathing increasingly difficult over time. Most cases of COPD are related to cigarette smoking.