Oral mucosal disease typically presents with the following symptoms: i. Plaques and plaques, which are changes in the color of the oral mucosa. Second, papules and plaques, which are small, substantial protrusions on the mucous membranes. Third, blisters, generally belong to the mucous membrane within the storage of liquid and the formation of blisters. Fourth, large blisters, if the diameter of the blister damage > 1cm is called large blisters. Fifth, pustules, pustules is also a kind of herpetic lesions, but there are pus products, instead of transparent herpes. Six, ulcer, ulcer is the integrity of the mucosal epithelium, persistent defects or destruction. Seven, vesicles, vesicles is a superficial defect of the mucous membrane. Eight, nodules, nodules are a kind of solid lesions protruding from the oral mucosa. Nine, tumors, oral mucosal tumors are generally understood. Others are atrophy, chaffing, pseudomembranes, scabs, scales, necrosis and gangrene, which are the symptoms of oral mucosa.