What Causes Bronchitis?

What Causes Bronchitis?

What Causes Bronchitis?

According to WebMD, bronchitis is an inflammation of the bronchial tubes, which carry air into the lungs. Acute bronchitis is typically caused by a virus; however, it can also be caused by bacteria. It often appears after infections of the upper respiratory tract, such as a cold or the flu.

WebMD notes that symptoms of bronchitis include coughing, as well as tiredness and a mild fever. With bronchitis, a cough can start off dry and then produce mucus after a few days. Symptoms usually last two to three weeks. Pneumonia is a possible complication of bronchitis, in which a patient can develop shortness of breath, high fever, chills and chest or shoulder pain.