What is a normal tongue?

The tongue coating of normal people is thin and evenly spread on the tongue surface. The

thin white and moist coating on the back of the tongue is usually called tongue coating, which is mainly composed of exfoliated keratinized epithelium, saliva, food debris, bacteria and other substances. When the human body performs chewing, swallowing and other actions, food and saliva can wash the tongue surface, continuously remove the substances on the tongue surface, and then form a thin white tongue coating. The middle and root of the tongue are relatively thick.

The changes of tongue coating can usually reflect the cold and heat of the human organs, the nature of the disease and the depth of the disease, which is conducive to the diagnosis of various diseases.