What is the relationship between human tongue and human health?

Tongue coating is related to health White fur generally shows exterior syndrome and cold syndrome. The tongue coating of normal people is thin, white and moist. At the same time, thin and white moss also means that the disease is on the body surface rather than in the body. The tongue coating is thin, white and too slippery, which is more common in exterior cold syndrome. Thin, white and dry fur indicates exterior heat syndrome or dryness. The tongue coating is white, thick and dry, which means that body fluid is injured by dampness, turbidity and heat. The tongue coating is covered with white coating, which is not dry to the touch. It is called "white powder", which means plague. White and dry fur is called "rough fur", which is more common in febrile diseases. A pale tongue with white and slippery fur represents cold syndrome or cold-dampness syndrome. The tongue coating is white, smooth and sticky, which is found in people with phlegm-dampness or dampness trapped in the spleen. The tongue coating is white, slippery and rotten, and heat accumulates in the stomach and intestines. If the fur is as white and dry as snowflakes, it is called "snowflake moss", indicating that the spleen is cold. The tongue and mouth are covered with clothes, and mildew spots or erosion spots appear, which is the harm of decreased stomach gas and dirty gas.