Mucous membrane pemphigoid (MMP) is a chronic, autoimmune, subepithelial vesiculobullous disease that very frequently affects the mucous membranes and less often the skin. Oral cavity is the most commonly affected site and desquamative gingivitis (DG) is the most common manifestation. This is the main reason why dentists play a vital role in the diagnosis and managing the oral health of patients. Treatment is usually challenging, however, it only can achieve temporary symptomatic effect. We report a case of desquamative gingivi-tis, manifestation of MMP that was treated successfully with topical corticosteroid. The latter was applied by using of individual made custom trays to improve clinical efficacy.