Dampness on the tongue can be treated by strengthening the spleen and drying dampness (strengthening the spleen and getting rid of dampness). Chinese medicine believes that the spleen is the main transporter (the spleen has the function of digesting food, absorbing food essence and water and transferring it to the whole body) of water and dampness, overeating, irregular diet and excessive fatigue will damage the spleen qi, resulting in the internalization of dampness and turbidity, the tongue manifestation of the tongue is mainly the thick and greasy tongue, then you can take the method of strengthening the spleen and drying the dampness to treat. If thick and greasy tongue coating is accompanied by abdominal distension, one can take Pinggou Tablet, which has the effect of drying dampness, transporting spleen, moving qi and harmonizing stomach (harmonizing stomach and internal organs by promoting qi operation), and can treat dampness stagnation in spleen and stomach, with thick and greasy tongue coating accompanied by distension of epigastrium (abdomen), inappetence, and vomiting and nausea. The adverse effects and contraindications of this product are not clear. It is recommended to use medication under the guidance of a doctor for the treatment of thick and greasy tongue.