Sting of the puss caterpillar: an unusual cause of acute abdominal pain.

We report the case of a 41-year-old man with abdominal pain after envenomization by a puss caterpillar. The patient's medical history and physical examination revealed classic symptoms, leading to the correct diagnosis and appropriate therapy with intravenous calcium gluconate. Although severe, local reactions to puss caterpillar envenomization have been previously described, to our knowledge this is the first report of a patient with severe, acute abdominal pain caused by a puss caterpillar's sting.