Trauma-induced bullous pemphigoid.

We describe three patients with bullous pemphigoid who presented with bullae at sites of trauma and with little spread of the condition outside such areas. The diagnosis was confirmed by histology and direct and/or indirect immunofluorescence; electron microscopy was performed in two cases to rule out the diagnosis of epidermolysis bullosa acquisita (EBA). Treatment was with either systemic steroids or ACTH in all three cases. Trauma-induced bullous pemphigoid should be included in the differential diagnosis of localized blistering eruptions.