Familial benign pemphigoid

Familial benign pemphigus (Familial benign pemphigus), also known as Hailey-Hailey disease, was reported in 1939. It is a dominant hereditary skin disease, and cases with no family history can also be seen. This disease is rare and can be triggered by friction, sunlight, damage, and bacterial infections. Some people believe that this disease is related to Darryl's disease.