There is a layer of pale white on the tongue, called tongue coating. Tongue coating is mainly composed of keratinocytes exfoliated from tongue mucosa, residual food residues, bacteria and other microorganisms growing in it. These components of tongue coating are continuously formed and will be swallowed into our stomachs as we eat and saliva washes away. Therefore, the total amount of tongue coating remains relatively balanced. The normal color of the tongue should be pink with a light white coating. There is a saying that tongue coating can identify diseases, which is reasonable. Let’s have a look. A white tongue The most common reason is the thickening of the tongue coating on the tongue surface. Poor oral hygiene, reduced saliva Read More …