Pediatric patients with mouth ulcers need to pay attention to oral hygiene. After each meal, use salt water, saline rinse, or medicated mouth rinse to prevent secondary infection due to aggravation of food residues. In addition, the establishment of good eating habits is also very critical. 1, to reduce the stimulation of the ulcer surface, as little as possible to eat irritating condiments. Such as chili, vinegar, ginger, onion, star anise, etc. These foods will not only induce pain, but also stimulate the ulcer surface and make it expand further. 2.Reduce the friction on the ulcer. So eat less fried food and other foods that are too rough and hard, such as fried ribs, fried chicken legs, nuts and so on. 3, to pay attention to nutrition, a balanced diet. In addition to daily consumption of fish, meat and other meat dishes, you must also eat more fresh vegetables, fruits and vegetables, especially foods rich in vitamin C, such as oranges. Although this kind of food will irritate the wound surface when you enter causing some pain, but it is very good for accelerating the healing of the ulcer surface. 4, eat more easily digestible food. Such as soy products, eggs, etc., to reduce the “pain” of eating. 5, do not eat too hot food, boiling water or boiling soup does not kill the ulcer surface bacteria, but will cause irritation. Therefore, wait until the food cools to room temperature before eating is the best choice. In the period of ulcer attack also pay attention to eat less and more meals, do not be afraid of pain and eat less or even not. 6. If the ulcer is too large and affects eating, you can eat some soft, easily digestible and liquid food while applying medicine. For example, add meat boiled porridge, fresh juice, vegetable juice, etc. In autumn, the weather is hot and dry, you can treat the same time, with food therapy, is conducive to the prevention and control of mouth ulcers, but also can get rid of fire.