Bronchitis is an inflammation of the lining of your bronchial tubes, which carry air to and from your lungs. People who have bronchitis often cough up thickened mucus, which can be discolored. Bronchitis may be either acute or chronic.
Chronic bronchitis is a more serious condition, is a constant irritation or inflammation of the lining of the bronchial tubes, often due to smoking.
Chronic bronchitis is defined as a productive cough that lasts for three months or more per year for at least two years. If you have chronic bronchitis, you’re likely to have periods when your cough or other symptoms worsen. At those times, you may have an acute infection on top of chronic bronchitis. Most people with chronic bronchitis have chronic obstructive pulmonary disease (COPD).
Please see Bronchitis section for all details on cause, symptoms and management.