The loss of oral mucosa after brushing is a sign that the patient is likely to have oral mucosal diseases such as aspergillosis and aspergillosis-like diseases, which can cause the loss of mucosa and detachment of the basal tissue. Patients with lichen planus, which has a rough and uneven surface, can also cause mucous membrane loss. There is also a case where the patient brushes his teeth too hard, causing some damage to the mucosa, and the patient’s resistance is weak for a while, causing a viral infection of the oral mucosa. Oral mucosa shedding is not a trivial matter, must be timely to the oral mucosa department or regular dental hospital, so that the doctor for examination and diagnosis, if it is a normal healthy mucosa, after brushing teeth will not cause shedding, so patients must pay attention to.