Chronic bronchitis is defined as a long term inflammation or swelling of the bronchi. This can result in heightened production of mucus and may be accompanied by other side effects. To be classified as chronic bronchitis, a harsh cough and expectoration (coughing up of mucus) must occur on most days, for no less than three months of the year, for two or more years in a row. http://www.squidoo.com/what-is-chronic-bronchitis Thu, 16 Feb 2012 15:04:43 -0600 FeedCreator 1.7.2 Tue, 28 Oct 2008 07:39:33 -0600 http://www.squidoo.com/what-is-chronic-bronchitis Chronic bronchitis is defined as a long term inflammation or swelling of the bronchi. This can result in heightened production of mucus and may be accompanied by other side effects. To be classified as chronic bronchitis, a harsh cough and expectoration (coughing up of mucus) must occur on most days, for no less than three months of the year, for two or more years in a row. Tue, 28 Oct 2008 07:39:33 -0600