The main reasons for children’s white and thick tongue coating are accumulation of food (indigestion of food and its accumulation in the stomach) and internal obstruction of dampness. 1. Accumulation of food: the child’s stomach capacity is generally small, in the case of eating too much food is easily indigestible, resulting in accumulation of food, the symptoms of white thick tongue, usually accompanied by loss of appetite, epigastric (abdominal) distension and fullness, belching (hiccups) and sour rot, stools are not in tune (stool abnormalities) and other symptoms. 2. Dampness internal obstruction: the spleen is the source of phlegm, the child’s spleen and stomach of the transport function is relatively insufficient, it is difficult to discharge dampness, it is easy to lead to the internal obstruction of dampness, there will be the performance of the tongue white thick, accompanied by a sticky mouth, tasteless, sticky stools, gastric and epigastric discomfort and other symptoms. Children with thick and white tongue coating are advised to go to regular hospitals for treatment under the guidance of professional physicians.