The Body's Immune System

Bronchitis is an inflammation or irritation that occurs in the bronchial tubes, the pipes that function as air conduit from the throat to the lungs. This results in narrowing of the airways and full of mucus. This phlegm or mucus accumulates as a response from the body's immune system when it catches infectious and non-infectious substances that cause bronchitis. Over time, mucus that accumulates in the bronchi will close and clog the respiratory tract. This will trigger the emergence of shortness of breath and coughing in response to the sufferer's body to help expel mucus. This problem can appear within days, weeks, or even months. Bronchitis generally begins with a cough, sometimes followed by mucus or phlegm as a result of inflammation of the bronchial walls. The most common cause of bronchitis is a virus. If not treated immediately, it can cause a decrease in the body's immune system. This then makes it easier for bacteria to enter, causing pneumonia, such as fever, chest pain, and decreased consciousness.