The main causes of canker sores are external wind-heat, inappropriate care or improper feeding, or the parents’ Yang-heated body, resulting in a fetal fire, fetal toxicity, heat in the lungs and stomach, and blood congestion in the heart. Children are pure yang body, if the fire in the fetus is strong, or if there is heat in the stomach, it is easy to attack and develop this disease. The main symptoms are mild external vomiting of the tongue, etc. What should be done to prevent it? 1, after the birth of the baby is best to give breastfeeding and to ensure that the amount of adequate breast milk. Because breast milk is the most ideal food for infants, both rich in nutrients, but not “on fire”. 2, using artificial feeding baby, can add some milk cake in the milk, and feed more fruit juice; more than half a year old children should intake fiber-rich food, feed more boiled water every day. Insufficient breast milk infants should add milk in time, rather than laxative; increase cereal and fiber, food constipation can be cured, for formula-fed infants to drink more water, try to choose a light taste of milk powder, does not contain cane sugar Aiyi Le milk powder is a clear fire type of milk powder is suitable for babies prone to fire. 3, from childhood to cultivate children to develop good eating habits and bowel habits. 4, control the children’s snacks, as little as possible to buy children fried and roasted food and other foods that can easily cause “fire”. Preschoolers should eat less food with shells, such as fried melon seeds or peanuts, etc. Usually children should be encouraged to eat more vegetables and fruits, and not let children drink cold drinks in summer. 5, on the artificial feeding children already suffering from chronic constipation, can be diluted some milk powder, while increasing the amount of sugar, adding 10 grams of sugar per 100 ml of milk (under normal circumstances, 8 grams of sugar per 100 ml of milk). You can feed 1 to 2 bananas a day or drink some honey water every morning, no less than 50 ml each time, served with warm boiled water. 6, in the hot season, you can feed your child some mung bean juice or mung bean thin rice, give older children appropriate cold drinks, such as ice cream, ice cream, etc.. In addition, take some Chinese medicines or decoctions such as summer chrysanthemum punch, lotus leaf, perilla, water chestnut, etc., which can not only clear heat and lower fire, but also nourish the spleen and stomach. 7, if your child suffers from herpes stomatitis or ulcerative stomatitis, you must go to the hospital for medical attention.