White tongue coating can be triggered by phlegm (pathological product formed by water metabolism disorder), food accumulation (indigestion of food and stagnation in the stomach), yang deficiency, etc. According to the different conditions, we need to use Baohe Pills, Si Shen Pills and other medicines to treat the problem, and only when the identification of the symptoms and the use of accurate medicines can be effective. Normal tongue coating that is thin, white and moist does not need to be treated. White tongue coating can be treated by differentiating the symptoms, such as phlegm and dietary stagnation, which can be seen as white and greasy tongue coating, accompanied by abdominal distension, reduced appetite, etc., and can be treated with Baohe Pill with Ercheng Pill and Spleen Enhancement Pill, etc.; and white and slippery tongue coating caused by deficiency of yang qi in spleen and kidney (deficiency of yang qi in the spleen and kidneys), and diarrhea in the morning, etc., can be treated by Sishen Pill with Lizhong Wan with Radix Rehmanniae Ziziphi Pill, etc. The adverse effects and contraindications of the above formulae are not known. If the patient is not feeling well, it is recommended to consult a doctor in time, and the treatment of white tongue should be combined with clinical symptoms and specific tongue signs, etc., and the medication should be taken under the guidance of a doctor, and should not be chosen without authorization, so as to avoid delaying the condition.