Bronchitis is a respiratory illness that occurs when the airways leading into your lungs get irritated, Nagata explains, which leads to the swelling and mucus buildup that causes difficulty breathing.

Bronchitis itself isn't contagious, but the viruses and bacteria that cause it are. For example, if you are sick with a cold and then develop bronchitis, your cold may spread to others.

Bronchitis is a respiratory illness that occurs when the airways leading into your lungs get irritated, Nagata explains, which leads to the swelling and mucus buildup that causes difficulty breathing.

Bronchitis is a respiratory illness that occurs when the airways leading into your lungs get irritated, Nagata explains, which leads to the swelling and mucus buildup that causes difficulty breathing.

Dec. 29, 2008 -- Question: If I'm taking antibiotics for bronchitis or pneumonia, how soon should I expect to feel better? Answer: Bronchitis and pneumonia are different things.

However, bronchitis is one of many conditions that can lead to excess phlegm, and while phlegm’s color provides some information on health status, it does not provide the whole picture.

Bronchitis, or inflammation of the bronchial tubes, can lead to hemoptysis, or coughing up blood. Learn about the causes, symptoms, treatment options, and more.

Bronchitis is inflammation of the airways that bring air to the lungs. It causes them to fill with mucus and fluids, leading to at least a week of coughing that brings up phlegm. Often, this ...