After brushing teeth, the inner wall of the mouth falls off a layer of white film is usually shedding oral mucosa, which may be related to oral dryness or food irritation, aspergillosis and other reasons. 1. When breathing with the mouth open or when the saliva secretion is small, due to the dryness of the mouth, the white film on the inner wall of the mouth can be detached when brushing, but the white film will disappear after rinsing. 2. Eating spicy and stimulating diet or overheated food, stimulating oral ulcers leading to erosion and necrosis can also be found when brushing the oral mucosa detachment. 3. Pemphigus: autoimmune dermatosis due to epidermal cell laxity, can appear in the mucous membrane or skin blisters, blisters, such as normal-type pemphigus almost all patients with oral mucosal involvement, the blisters have a thin wall, easy to rupture the formation of painful vesicles and ooze. After brushing teeth oral mucosa, if no other symptoms or disappear on their own, do not have to worry too much; if the mucosal detachment accompanied by oral pain need to consult a doctor in a timely manner, follow the doctor’s instructions for treatment.