- Erysipelas is a bacterial infection of skin involving upper subcutaneous tissue with marked dermal lymphatic vessel involvement. - Causative organisms are group A streptococcus and staphylococcus aureus. - Characterised by an erythematous, edematous and painful indurated plaque with sharply demarcated borders. - Face, ear and lower limbs are involved. - Patient May present with history of minor trauma and is associated fever and malaise. FIGURE : Butterfly rash of erysipelas. The sharp demarcation between the salmon-red erythema and the normal surrounding skin is evident. Reference : IADVL&;s concise textbook of dermatology, first edition, pg no:43