If mouth ulcers occur, in the absence of medication, pay attention to maintain oral hygiene, can be used to gargle with salt water, to prevent infection of the ulcer surface. It is recommended to consult a doctor in time, need to clarify the nature of mouth ulcers, such as recurrent mouth ulcers, traumatic mouth ulcers, and then targeted treatment. 1. Recurrent mouth ulcers occur when the patient’s body resistance is poor, need to regulate work and rest and eating habits, eat more fresh vegetables, fruits to supplement vitamin B, vitamin C, and avoid staying up late, increase the rest time, can promote the healing of ulcers. Usually pay attention to relax the mind, avoid anxiety and tension and other emotions, general mouth ulcers can heal by themselves. 2. Traumatic mouth ulcers generally do not need medication, in a timely manner to eliminate local traumatic factors, generally will gradually return to normal, such as the extraction of residual roots, residual crowns. Mouth ulcers occur after the pain is more intense, diet needs to avoid eating spicy, stimulating, fried, pickled food, so as not to cause irritation to the ulcer surface, aggravate the pain. If the ulcers exist for a long time, the duration of the disease is more than 1~2 months, and the ulcer surface is expanding, and even the phenomenon of erosion occurs, it is necessary to consult a doctor in time to exclude the possibility of cancerous ulcers.