What's with the thick and white tongue?

Traditional Chinese medicine regards tongue inspection as an extremely important link in inspection. The nature and depth of evil qi can be judged through the expression of tongue substance and tongue coating. Generally, the tongue substance of normal people is light red and bright, the tongue body is moderate in size, soft and flexible, and the tongue coating is uniform and thin. For patients with thick and white tongue coating, they should seek medical treatment in time. Thick and white tongue coating is generally caused by diet injury to stomach or accumulation of phlegm or evil qi, and can also be seen in normal people. If diet is not section or overeating, damage spleen and stomach, food stagnation, stomach loss and decline, stomach qi deficiency cold, it can show the performance of thick and white tongue coating; If the body is phlegm and dampness, phlegm and dampness accumulation, abnormal body fluid distribution, thick and white tongue coating can also be seen; If the disease does not recover for a long time, the course of disease continues, evil enters, some patients can also show thick and white tongue coating performance, but generally yellow thick coating; If normal people drink milk or eat dairy products, they can also show short-term thick and white tongue coating performance.