Erysipelas is a bacterial infection in the upper layer of the skin. It is similar to another skin disorder known as cellulitis, which is an infection in the lower layers of the skin. Both conditions are similar in appearance and are treated in the same way.

Erysipelas is usually caused by the Group A Streptococcus bacterium, the same bacterium that causes strep throat. The infection results in large, raised red patches on the skin. This is sometimes accompanied by other symptoms, including blisters, fevers, and chills. Erysipelas most frequently occurs on the face and legs.

Erysipelas often improves with treatment. The infection can usually be treated effectively with antibiotics.