People with mouth sores should eat more fresh vegetables and fruits to replenish sufficient vitamins, and the texture of the fruits should not be too hard, you can eat more fruits like grapefruit, orange, kiwi, grape, dragon fruit. At the same time, you should eat more animal offal, lean meat, carrots, nuts, coarse grains and cereals, etc., to supplement the rich vitamin B and other trace elements. You can also use oral zinc gluconate oral solution and iron supplements to supplement trace elements. People who have mouth sores also need to drink more water. They can drink more teas that have the function of clearing heat and lowering fire, such as chrysanthemum tea, bamboo leaf tea and honeysuckle tea. These teas have the function of lowering fire and can promote the healing of mouth and tongue sores. At the same time in the diet to avoid spicy and stimulating food and food with too high a temperature, to prevent local mucosal ulcers or even ulcers, causing local irritation.