Erysipelas is an acute inflammatory infection of the skin and lymphatic network, mainly caused by beta-hemolytic streptococcal infection, commonly occurring in the lower limbs and face. Typically, it is not contagious by itself. In terms of treatment, patients should rest in bed, elevate the affected limb, and locally apply 50% magnesium sulfate solution for wet compresses, while using systemic antibacterial medications, such as intravenous penicillin drips. After local and systemic symptoms disappear, medication should continue for three to five days to prevent recurrence.