Mouth ulcers are red, swollen and painful sores in the oral mucosa that take some time to heal. Increased energy intake during diet is good for tissue recovery, fruits and vegetables rich in vitamins are good for recovery, and fine foods are good to avoid damage to the ulcer wound can also be good for fast healing of the ulcer. The process of tissue recovery requires sufficient energy and protein. Therefore, eating foods with high energy and protein are good for recovery. Cheese, yogurt, milkshakes, pudding, ice cream and other dairy products contain a lot of fat and protein, which are good for the recovery of mouth ulcers. These foods are soft in texture and do not easily irritate the ulcer wound causing pain. Tissue recovery also requires adequate amounts of various types of vitamins in the body. Vitamin B, vitamin C and vitamin A can help the ulcer to grow more quickly, and these vitamins themselves have a role in promoting the healing of the mucous membrane. Therefore, during the development of mouth ulcers, it is necessary to take a vitamin-rich supplement. Various green leafy vegetables, melons and fruits are extremely rich in vitamins to facilitate the healing of ulcers. The mouth ulcer itself is a tissue destruction of the oral mucosa. Faster healing requires minimizing further damage to the ulcer wound. Food should be prepared more carefully to facilitate healing. Generally, food needs to be chopped up and coarse textured foods avoided to help the mouth ulcer heal. Mouth ulcers can cause pain and discomfort that can affect work and life, and it is important to pay attention to your diet during treatment to facilitate healing.