According to Chinese medicine, changes in the tongue moss are closely related to the function of the body’s digestive system. If a child has a very thick layer of tongue moss on the tongue, which is not easy to scrape off, and a sour and foul odor emits from the mouth, it is often an indication of a problem with the child’s gastrointestinal function. Related to diet and pediatric constitution, the details and treatment are as follows: a. Dietary factors: If the child eats too much at each meal, or eats too much grease or cold, this will lead to food accumulation, affecting the spleen and stomach transport, and feedback to the tongue will present thickened tongue moss. At this time, we must control the child’s diet, do not allow the child to eat too much, and pay attention to nutrition, avoid the child to eat too much protein and starchy food, but to increase some fiber food, such as fresh fruits and vegetables. If it is more serious, you can take pediatric elimination granules, Baohe pill and probiotics for treatment. Second, the physical factors: 1, the spleen and stomach cold: If the tongue coating is thick and white, more suggests that the child’s spleen and stomach cold, water and damp transport is not good, for this type of children are recommended to be warm, strengthen the spleen, damp drug treatment, you can use warm spleen soup to improve the child’s spleen and stomach cold situation. In addition, it is also necessary to optimize the child’s diet structure, choosing to eat light, nutritious and easily digestible food, eating more fruits and vegetables, and drinking more warm water. Avoid eating cold, cold, too sweet, too sticky and other stimulating foods, which can play a role in regulating the child’s spleen and stomach coldness. 2. Spleen and stomach dampness and heat: If accompanied by a yellow face and a bad taste in the mouth, consider the spleen and stomach weakness and spleen and stomach dampness and heat, you can take appropriate spleen san and give the child more barley porridge to achieve the purpose of dispelling dampness. The child should take care to optimize the diet structure and eat less red meat and fried chicken.