Bronchitis is a common respiratory illness, and it can lead to worse things, like pneumonia, when left untreated or not treated quickly. But, why? Our AFC Urgent Care Cleveland team provides some helpful information about bronchitis below, so read on! What Actually Is Bronchitis? Bronchitis is when the bronchioles, the air-carrying tubes in the lungs, become infected and make too much mucus. Additionally, there are two types of bronchitis: chronic and acute. Chronic bronchitis is ...