This document summarizes information about erysipelas, an acute bacterial skin infection caused mainly by group A streptococci. It presents as a raised, sharply demarcated red patch with a fiery red color and vesicles at the advancing border. Symptoms include pain, burning and tenderness. Treatment involves initial parenteral antibiotics such as penicillin or cefazolin, followed by oral antibiotics to prevent complications. Recurrence is common without long-term prophylactic antibiotics in susceptible individuals, which can lead to permanent skin thickening. The lower legs, face and ears are most commonly affected.