By Dakoda Powell
Bronchitis is an inflammation of the air passages within the lungs. It occurs when the trachea (windpipe) and the large and small bronchi (airways) within the lungs become inflamed because of infection or other causes.
Symptoms of chronic bronchitis may include wheezing and shortness of breath, especially upon exertion and low oxygen saturation. The cough is often worse soon after awakening and the sputum produced may have a yellow or green color and may be streaked with specks of blood.