If children’s mouth ulcers, want to treat the main from the following aspects: first of all, when the ulcer must eat a light diet, do not eat spicy stimulating food, do not eat too salty food, you can eat thin and soft food. Secondly, applying medication locally to the ulcer can reduce the pain of the ulcer and promote healing, commonly used medications include children’s open throat sword spray, watermelon cream and so on. The immunity of children can also be improved by taking transfer factors. Children can be given a balanced diet and physical exercise, and the symptoms of ulcers are usually reduced when the immune system is improved. Lastly, when ulcers occur, you need to drink more water and maintain oral hygiene, you can apply chlorhexidine mouthwash to gargle to reduce the bacteria in the mouth.