Erysipelas is a skin infection due to group A streptococci with acute onset. Fever, headache and vomiting are common symptoms. This condition particularly affects the very young, the very old and the immunosuppressed.

The erythematous skin lesion enlarges rapidly and has a sharply demarcated raised edge. Vesicles and bullae appear and later rupture, leaving crusts behind.

Treatment is with penicillin.