The ulcers inside the mouth are generally referred to as mouth ulcers, and the treatment mainly consists of reducing irritation, local medication, and systemic medication. 1. Reduce stimulation: Reduce local stimulation factors such as spices and sharp edges of teeth. 2. Local medication: local can choose to promote healing, pain and other drugs, such as recombinant human epidermal growth factor gel, tretinoin oral cream, topical ulcer powder, ciprofloxacin mouthwash and so on. The use of medication should be under the guidance of a doctor. 3. Systemic medication: In severe cases, systemic medication can be used, such as vitamin C, prednisolone and so on. The use of medication should be under the guidance of a doctor. The ulcers inside the mouth are recommended to consult the hospital in a timely manner, to clarify the cause of the disease, and to carry out targeted treatment and therapy under the guidance of the doctor.