A 13-month-old girl developed multiple pruritic, 1- to 7-cm, vegetating and ulcerative masses on the neck, extremities, and trunk after a one-week course of an antibiotic and an expectorant that contained potassium iodide, prescribed for treatment of a respiratory tract infection. Clinical and histopathologic findings were consistent with the diagnosis of iododerma. A thorough search for an underlying disease was negative. On cessation of potassium iodide and administration of oral prednisolone 1 mg/kg/day, a dramatic response was achieved.