(HealthDayNews) -- Cellulitis is a skin infection that's especially common in children and those adults with compromised immune systems.
The infection can affect any part of the body, but usually surfaces on the lower legs or face. It appears as an area of redness, swelling and tenderness under the skin, and often occurs in places where there's a cut or scratch.
Cellulitis is caused by many different kinds of bacteria, including those from dog, cat or other animal bites. It can also be caused by fungal infections such as athlete's foot, says a University of Southern California article.
Antibiotics or anti-fungal medications can be used to treat cellulitis.