Mouth ulcers may be traumatic ulcers, recurrent aphthous ulcers, and treatment is mainly removal of the irritant and local treatment. Traumatic ulcers are usually caused by stump root and crown irritation. If the stump root and crown are removed, the ulcer will heal. Recurrent aphthous ulcer treatment options are topical treatments such as tretinoin oral cream, recombinant human epidermal growth factor gel, and topical ulcer sanitizers, and also mouthwash, which are mainly used to promote ulcer healing. You need to use the medication under the guidance of your doctor. If the mouth ulcers do not heal for a long time, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.