It's critically important for people with COPD to quit smoking. After quitting, the rate of decline of lung function slows considerably. For many people, a combination of support—counseling, telephone "quit lines," support groups—and nicotine replacement therapy works best, so talk to your health care provider.
Chronic bronchitis is defined as the presence of a mucus-producing cough that persists for at least 3 months in at least two consecutive years.
In people with COPD, signs of the disease are caused by the body's attempt to compensate for a damaged respiratory system.
Emphysema is an irreversible, progressive condition characterized by inflammation and reduced airflow in the lungs.