Cellulitis is a common bacterial skin infection that causes redness, swelling and pain.
Cellulitis is a contagious bacterial infection of the skin. The affected skin becomes swollen and inflamed, and is usually painful to touch. If left untreated, it can spread to the lymph nodes and bloodstream and become life-threatening.
While cellulitis often affects the feet and lower legs, it can occur anywhere on a person’s body. Cellulitis usually occurs when certain types of bacteria enter the skin through a break in its surface. It can start in skin injuries such as bug bites and cuts.