what is cellulitis

Cellulitis is a common bacterial skin infection that affects the middle layer of the skin (dermis) and the tissues below. It is caused by bacteria, most commonly streptococcus and staphylococcus, entering through a crack or break in the skin. The affected skin is swollen, inflamed, and typically painful and warm to the touch. Cellulitis usually occurs on one side of the body and can appear anywhere, but it is most common on the feet and legs. The skin may look pitted, like the peel of an orange, or blisters may appear on the affected skin. Some people may also develop fever and chills. If left untreated, the infection can spread to the lymph nodes and bloodstream and rapidly become life-threatening. Anyone can get cellulitis, but some factors can increase the risk of getting this infection, including infections or injuries that break the skin. Seek medical attention immediately if the red area of the skin spreads quickly or you develop a fever or chills. Complications of cellulitis can be very serious, including extensive tissue damage and tissue death (gangrene), and the infection can also spread to the blood, bones, lymph system, heart, or nervous system.