Chinese medicine believes that children’s tongue coating white thick and greasy with diet stagnation, spleen and stomach weakness and other causes. 1. Dietary stagnation: children’s tongue coating white thick and greasy may be caused by accumulation of food, due to dietary stagnation, up to the tongue, and the emergence of tongue coating white thick and greasy, in addition to nausea and vomiting, loss of appetite, bad breath, abdominal distension and other symptoms. 2. Weakness of the spleen and stomach: Children’s white greasy tongue coating may be caused by the weakness of the spleen and stomach, the spleen is weak to transport and transform the water and grain, the grain gas upward in the tongue, and the emergence of white greasy tongue coating. In addition, it may be accompanied by symptoms such as poor appetite, loose stools, yellowish color (yellowish without luster), and thinness of the body. Parents should take their children to the hospital in time when they have symptoms of white, thick and greasy tongue coating, and treat them under the guidance of professional doctors.