Bullous pemphigoid

Overview
Bullous pemphigoid, also referred to as BP, is a chronic autoimmune skin disease, involving the formation of blisters below the surface of the skin and antibodies against the type XVII collagen component of hemidesmosomes. It can also (albeit only rarely) involve the mucous membranes, and has been shown to afflict dogs, cats, pigs, and horses, as well as humans.