Bronchitis is inflammation of the mucous membranes of the bronchi , the airways that carry airflow from the trachea into the lungs . Bronchitis can be divided into two categories, acute and chronic, each of which has distinct etiologies, pathologies, and therapies. Acute bronchitis is characterized by the development of a cough , with or without the production of sputum , mucus that is expectorated (coughed up) from the respiratory tract . Acute bronchitis often occurs during the course of an acute viral illness such as the common cold or influenza . Viruses cause about 90% of cases of acute bronchitis, whereas bacteria account for fewer than 10%. Chronic bronchitis , a type of chronic obstructive pulmonary disease , is characterized by the presence of a productive cough that lasts for three months or more per year for at least two years. Chronic bronchitis most often develops due to recurrent injury to the airways caused by inhaled irritants. Cigarette smoking is the most common cause, followed by air pollution and occupational exposure to irritants.
All the information, content and live chat provided on the site is intended to be for informational purposes only, and not a substitute for professional or medical advice. You should always speak with your doctor before you follow anything that you read on this website. Any health question asked on this site will be visible to the people who browse this site. Hence, the user assumes the responsibility not to divulge any personally identifiable information in the question. Use of this site is subject to our Terms & Conditions