The treatment of recurrent oral ulcer has the following points: 1, adjuvant drugs can be used to relieve the pain of ulcer and promote the healing of ulcer. Include throat-opening sword spray, stomatitis spray, furacilin paste, epidermal growth factor, etc. 2, the usual diet should be supplemented with foods rich in vitamin C and vitamin B, eat more vegetables and fruits, and supplement the multivitamins needed by the body, which is conducive to the healing of ulcers; 3, diet, avoid spicy and irritating food, do not eat too hot food, these will hinder the healing of ulcers, and aggravate the symptoms of ulcers.