Infection of the Bronchi - Acute Bronchitis

Acute bronchitis is inflammation, or swelling, of one or more bronchi. Bronchi are the branches of the main windpipe that carry oxygen into the lungs.

What is going on in the body?

Acute bronchitis is often caused by an infection from virus or bacteria. The infection irritates the lining of the air passages called bronchi. This causes the symptoms of bronchitis.

What are the causes and risks of the infection?

The most common cause of acute bronchitis is a viral infection such as the flu. Sometimes bacteria can cause this disease as well. Breathing air that contains irritants, such as chemical fumes, acid fumes, dust or smoke, increases the risk of the disease.