多形红斑（ｅｒｙｔｈｅｍａｍｕｌｔｉｆｏｒｍａ）是一种病因较复杂的自限性皮肤炎症性疾病，有红斑、丘疹、水疱等多形性皮疹，对称分布，并有特征性的靶形或虹膜样红斑，临床诊断不难。其重症型则皮疹分布广泛，出现紫癜性红斑、水疱和大疱，粘膜损害，以及严重的全身... Erythema multiforme is a more complex self-limiting inflammatory disease of the skin with erythema, papules, blisters and other pleomorphic rash, symmetrical distribution, and has a characteristic target or iris-like erythema, clinical diagnosis Not difficult. The severe type of rash is widely distributed, there purpura erythema, blisters and bullous, mucosal damage, and severe systemic ...