Frequent mouth ulcers may need to remove the local irritants, vitamin supplements, improve immunity, adjust the psychological state and so on to be able to get rid of the root, it is recommended to go to the hospital for specific examination and treatment. 1. Frequent mouth ulcers can be eliminated if there are sharp teeth or restorations in the local area, which can be removed in time. 2. If caused by lack of vitamins, timely supplementation and ensure that food supplementation, to maintain the body nutritional balance, can remove the root. 3. If it is due to poor immunity and systemic diseases, it should be treated in time and actively exercise to improve immunity. 4. If the ulcers are caused by psychological anxiety or tension, psychological counseling or self-adjustment is needed.