Mucous Membrane Pemphigoid (MMP) is a rare, inflammatory autoimmune disorder characterized by blistering lesions that affect the mucous membranes of the body, especially the mouth and the eyes. It is also known as Ocular Citatrical Pemphigoid.
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Johns Hopkins Medicine answered
David Demartini, Ophthalmology, answered
MMP is a chronic autoimmune disease that affects mostly elderly patients where the body's white blood cells get programmed to attack their own mucous membranes of the eyes, mouth, colon and/or vagina. There is no known cause but the genetics are beginning to be understood. Women are more often affected than men. Usually it starts with redness, irritation, burning or discharge and slowly progresses to dryness, scarring and loss of function. Treatment is difficult and usually requires strong antimetabolite medications which can have multiple side-effects and need to be monitored carefully