Chronic Bronchitis is defined as a persistent cough that occurs every day with mucus production that lasts for at least 3 months in each of two successive years, and for which other causes have been excluded.
Chronic Bronchitis is one of two forms of bronchitis described here, the other being acute bronchitis. In both cases the meaning of the term "bronchitis" is inflammation of the bronchioles - see the page about components of the respiratory system for further information about bronchioles and other parts of the lungs. Chronic Bronchitis is not primarily an inflammatory condition, although it is frequently complicated by acute infections.
Chronic Bronchitis is associated with cigarette smoking, air pollution, and emphysema.
- Coughing up excessive mucus secreted by enlarged bronchial mucus glands
- Bronchospasm that cannot always be relieved by bronchodilator drugs.
See also a list of diseases and disorders of the respiratory system (info all on one page).