The white mucous membrane skin in the mouth is actually the oral mucosa, and the metabolism of the oral mucosa is relatively fast. In addition to the normal physiological phenomenon, there may also be oral ulcers, thrush, aspergillosis and other diseases: 1. Normal physiological phenomenon: the epithelium of the oral mucosa is metabolized faster, and during the daytime, the metabolized mucosal epithelium will be flushed out with saliva. At night, because saliva secretion is reduced and the mouth is not active, resulting in aging mucosal epithelium can not be shed and still attached to the inner walls of the mouth, so it looks like there is an obvious white mucosal skin, which is a normal physiological phenomenon, and will generally fall off naturally when brushing teeth, drinking and eating, without treatment; 2, oral ulcers: white mucosal skin can appear in the center of the necrotic oral ulcer, slightly congested red and swollen around it. Pain is obvious. Local pain relief and anti-inflammatory, the application of watermelon cream, Bendamycin spray and other drugs, eat more vegetables and fruits, supplement vitamin C, vitamin B, such as fresh oranges, spinach, peanuts, eggs, liver and other foods can promote ulcer surface healing; 3, thrush: oral mucosa will appear white membranous material, similar to the white mucous membrane skin, is a weak immune patients, especially infants and children are prone to diseases, small infants treatment Fluconazole is generally preferred to be applied to the affected area, and children older than 1 year old can take oral fluconazole; 4, aspergillosis: blister-like damage can usually occur in the oral cavity or other parts of the mucosa, and when the blisters dry up, white skin can be found in the mucosa, and patients need to observe the presence of blisters to initially determine whether it is related to this disease; 5, other: external trauma can also cause biting through the oral mucosa, resulting in mucosal skin Shedding. Female endocrine disorders can also cause the oral mucosa peeling, some people in the mood swings are relatively large, long-term stress insomnia is also easy to have white mucosal skin in the mouth, these cases do not require drug treatment, pay attention to rest, generally can be self-healing.