Oral ulcer usually needs to be referred to the mucosal disease department. It is caused by a variety of causes, which may be caused by the recent decline of body resistance, lack of vitamins and other reasons. Clinically, it can be divided into light, heavy and stomatitis types. The heavy type can leave scars after healing, while the light type can leave no scars after healing. After oral ulcer occurs, it is necessary to treat symptomatically, adjust your mood, take medicine such as Bingpeng Powder and watermelon cream, and eat food rich in vitamin C; Of course, some prednisolone acetate suspension can also be injected, and most patients can recover by themselves within 1 to 2 weeks; If it happens frequently, transfer factors can be used to improve immunity. If the above methods can not achieve good results, you can also seek the help of traditional Chinese medicine.