Mucous membrane pemphigoid (MMP) refers to a group of autoimmune disorders that affect the mucous membranes in the mouth and other areas of the body. The disorders typically present as blistering lesions, and the mouth can become red and painful as a result. The condition can affect the gums, the roof of the mouth, the inner cheeks, and can cause sensitivity and bleeding. In very severe cases, the lesions can spread to the oesophagus and larynx, causing difficulty with swallowing, although this is rare. The cause of the condition is unknown, and treatment depends on the patient’s specific case. In some cases, a team of specialists is required to find the best possible treatment plan.