Cicatricial pemphigoid/benign mucosal pemphigoid (also known as mucous membrane pemphigoid, or benign mucous membrane pemphigoid) is a rare chronic autoimmune blistering disease characterized by erosive skin lesions of the mucous membranes and skin that results in scarring of at least some sites of involvement. The autoimmune reaction most commonly affects the mouth, causing lesions in the gums, but it can also affect areas of mucous membrane elsewhere in the body, such as the sinuses, genitals and anus. When the cornea of the eye is affected, repeated scarring may result in blindness. The management depends upon the severity of the condition. Simple measures that can be taken include avoidance of hard, sharp or rough foods, and taking care when eating. Good oral hygiene is also usually advised, and professional oral hygiene measures such as periodontal scaling.