Derm Dx: Asymptomatic Blisters on the Hands, Arms, and Feet

A 26-year-old man presents for evaluation of blisters on his hands, arms, and feet. The condition has been present for approximately 4 days and is asymptomatic. Similar blisters appeared 3 years ago while the patient served overseas in the military. Medical history is unremarkable for systemic disease, and he is not taking any oral medications. He occasionally develops cold sores ...