But bronchitis is also present in many of these individuals. The most common cause of acute bronchitis are respiratory infections. Many of the viruses that cause colds and throat infections are also able to grow on the lining of the bronchi, causing inflammation. The main symptom of acute bronchitis is a deep, sometimes rattling cough that brings up sputum that is often grey or yellow in color. The cough feels different from that caused by an irritation of the throat.
Some people say it sounds like they are underwater.
Many people will have acute bronchitis at least once every few years. It usually clears up in a few days without any specific treatment. Reducing fever may provide greater comfort, but it does not cure the condition of acute bronchitis. Cough suppression is also for comfort. Because the excess sputum can provide a good place for infections to grow, coughing up the sputum is an important part of recovery.