Children with thick yellow tongue coating may be related to food accumulation (food indigestion and stagnation in the stomach), dampness and heat, etc. Different treatments should be taken according to different causes, such as general treatment, medication, etc. It is recommended to consult a doctor in a timely manner. 1. Accumulation of food: When patients suffer from indigestion, food accumulates in the stomach, and when the time is too long, it can be concentrated and transformed into heat (the evil qi stays for a long time will be transformed into heat), which will be reflected in the tongue coating, and it may be manifested as a thick and yellowish coating on the tongue. This kind of patients can be relieved by massaging the abdomen or exercising properly, or following the doctor’s instructions to use stomach-enhancing and eliminating tablets, hawthorn pills and other medicines. 2. Dampness and heat: When dampness stagnates in the middle jiao, turbid qi does not descend, clear yang does not rise (light and clear yang qi can not rise), through the stomach upward fumigation on the tongue can lead to the phenomenon of thick yellow tongue coating. This kind of patients can follow the doctor’s instructions to take flat stomach powder, San Ren Tang and other proprietary Chinese medicines to regulate, and should also pay attention to a light diet, do not eat spicy stimulation, greasy and cold food. If there is any discomfort, it is recommended to consult a hospital in a timely manner, under the guidance of a professional physician for treatment, do not take medication without authorization, in order to avoid adverse consequences.