Thick tongue coating can be seen in a variety of situations, such as the body of cold and damp congestion or phlegm (water metabolism disorders formed by the formation of pathological products) and so on, but the specific diagnosis also need to be a professional physician to look at the smell and ask for diagnosis. Normal people have a layer of thin white and moist moss on the surface of the tongue, called tongue moss, tongue moss white refers to the color of the tongue moss, tongue moss thick refers to the tongue moss moss quality. The white color of the tongue moss is mostly seen in cold and superficial evidence; the thickness of the tongue moss can generally reflect the severity of the disease, and the thick tongue moss generally suggests that the disease is more serious. Thick and greasy tongue coating is mostly seen in dampness and turbidity, or phlegm, food accumulation (indigestion of food and accumulation in the stomach), etc. If the tongue coating is white and dry, it can be seen in dampness and turbidity and heat injury to the fluid. Chinese medicine theory is concerned about the overall view, purely a tongue coating white thick and can not accurately explain the problem, want to determine the tongue coating white thick what is going on, in addition to look at the tongue coating, tongue texture, but also recommended in the guidance of a professional Chinese medicine practitioner through the four diagnostic combination of the examination of smell, questioning and cutting and diagnosis of the evidence after the treatment.