寻常天疱疮是一种慢性的皮肤和粘膜发疱性疾病,在病情活跃时几乎均有口腔粘膜损害。65%以上的病例口腔粘膜为原发部位,在出现其它部位损害前,口腔损害可持续数月甚至数年。当寻常天疱疮局限于口腔粘膜时,有时与其它发疱性糜烂性口腔疾病很难 Pemphigus vulgaris is a chronic skin and mucocutaneous blister disease that has almost all oral mucosal damage when it is active. More than 65% of cases of oral mucosa as the primary site, in the event of damage to other parts, oral damage can last for months or even years. When pemphigus is confined to the oral mucosa, it is sometimes difficult to treat other bullous erosive oral diseases