There is no clinical research to support the idea that a woman with a thick white tongue should be wary of the four diseases, so this claim is not credible. According to the theory of Chinese medicine, thick and white tongue coating can be seen in dampness, phlegm (water metabolism disorders formed by the pathological products), food accumulation (indigestion of food and stagnation in the stomach) three kinds of diseases. 1. Dampness and turbidity stops within the body: the body of the spleen is weak, dampness, dampness and turbidity within the body, yang qi is curbed, water and dampness upward on the tongue and the formation of thick white moss. 2. Phlegm-beverage: Due to the abnormal transmission and distribution of water in the body and the impaired qi-chemistry function of the San Jiao, the water in the body stops and accumulates in the stomach and intestines, resulting in the formation of phlegm-beverage. The phlegm and drink do not dissolve, upward fumigation on the tongue and the formation of thick white moss. 3. Accumulation of food: patients with improper diet or dietary preferences, resulting in food and drink, stagnation of the stomach and intestines, the spleen and stomach dysfunction, stagnation of qi and the formation of accumulation of food. The accumulation of milk and food, stagnation of qi, and insufficient moistening of qi and blood lead to a thick white tongue. If there is thick white moss, you should go to the hospital in time for hospital-related examinations to clarify the cause of the disease, and actively cooperate with the doctor’s treatment, do not treat yourself.