The characteristic skin lesions present large and tense blisters arising on normal, erythematous, or urticarial bases and most commonly involve lower abdomen, inner thighs and flexural areas.

• 皮肤典型病灶呈现大而紧绷的水泡，水泡底部呈肤色、红色或荨麻疹样，好发于下腹部、大腿内侧及肢端曲侧。