Pemphigus is an autoimmune, blistering disorder which is characterized by fragile blisters which can occur anywhere on the body in older adults. It can initially begin in the mouth with erosions or ulcers on the gums and the inner lining of the mouth.There are a variety of different types of pemphigus including pemphigus vulgaris (the most common type), pemphigus foliaceous, and pemphigus vegitans, among others. Diagnosis is made by a clinical presentation as well as blood work and biopsies. Treatment can be difficult and involved. Dr. Crotty is recognized by the National Pemphigus Foundation as an expert in treating this disease.