To get rid of ulcers in the mouth quickly you need to remove external irritants, then work with medication to promote healing of the ulcers, and keep your mental health in check. 1. Remove external stimuli. The appearance of ulcers may be caused by the oral cavity has too sharp tooth tip, stumps or eating food scratches oral mucosa, need to adjust grinding too sharp tooth tip, remove stumps or bad restorations. Eat a light diet and less irritating food. 2. Take medication. Anti-inflammatory drugs that promote ulcer healing, such as glucocorticosteroids, cediriodine tablets, lidocaine gel, etc., can be used under the guidance of a physician. 3. Mental health. Keep your body and mind happy, have a good psychological state, improve the body’s immunity can promote the healing of ulcers. Ulcers usually heal on their own in a week or so, and if they don’t heal for a long time, it is recommended to go to the hospital in time.