Children with thick white tongue coating may be due to food accumulation (food indigestion and stagnation in the stomach), external cold and dampness. Children’s organs are delicate, the shape of the gas is not full, the function of the spleen is often insufficient, children do not know how to eat and drink, parents do not feed properly, will often accumulate food. Accumulated food is often manifested as poor appetite, accompanied by nausea, vomiting, abdominal distension, inability to pass stools, white and greasy tongue coating, smooth pulse. Baoho Pills can be used. The composition of Baohe Pill includes hawthorn, lycopodium, shenqiu, semixia, tangerine peel, poria and forsythia. It has the effect of eliminating food and harmonizing the stomach. Adverse effects are not clear; it is not suitable for people with spleen deficiency and food accumulation. When children have external cold and dampness, there are symptoms such as malignant cold (fear of cold), fever, chest tightness, pain in the epigastrium (abdomen), and white, thick and greasy tongue coating. You can use Huo Xiang Zheng Qi San. The formula consists of Huo Xiang, Dabu Pi, Perilla, Poria, Platycodonopsis, Chen Pi, Atractylodes Macrocephala, Hou Pu, Han Xia, Angelica Dahurica, Ginger, Licorice, and Jujubes. It can detoxify the surface and resolve dampness (relieving the evils of external sensation and dispelling the dampness in the body). Please use the medicine under the guidance of a physician.