If you have oral ulcer, it is recommended to eat more foods rich in vitamins in your daily life, as follows: 1. You can eat more Chinese cabbage, which is rich in vitamins and has a good therapeutic effect on ulcers, which can accelerate the healing of ulcers and prevent the malignant transformation of ulcers from leading to more serious diseases. 2. You can eat Chinese cabbage, which is rich in vitamin B2 and trace element zinc. These elements can promote the healing of ulcers, and at the same time nourish the stomach, promote fluid production, cool and reduce fire. 3, you can eat lotus root, lotus root contains a lot of vitamin C and vitamin K, which can promote the recovery of ulcer wounds, and contains trace elements such as vitamin B, which can promote the repair of oral mucosal epithelium. 4, you can eat more tomatoes, tomatoes contain a lot of vitamin B, vitamin A, vitamin K, riboflavin, ascorbic acid and so on. It can prevent gingival bleeding and treat oral ulcers.