Tooth marks on the tongue refers to the appearance of tooth marks on the tongue. Most of them are caused by spleen deficiency, as the dampness in the body cannot be expelled from the body in time, thus causing a fat tongue, which is not associated with cancer and is not a precursor of cancer. According to Chinese medicine, there are more reasons for tooth marks on the tongue, and the common cause is heavy dampness in the body. If the patient has heavy cold and dampness, in addition to having teeth marks on the tongue, he or she will also have symptoms such as dry mouth, thirst and preference for hot water. Patients with heavy damp-heat will have a toothy tongue, accompanied by a fat tongue and a red tongue. In addition, tooth marks on the tongue may also be caused by yang deficiency, mainly spleen yang deficiency and kidney yang deficiency. Insufficient yang energy in the spleen and kidney organs, which reduces the function of transporting water and fluid, will cause water-dampness in the body to stagnate and be reflected on the tongue, resulting in tooth marks on the tongue. Patients with teeth marks on the tongue should pay attention to a reasonable diet, reduce the intake of cold and raw foods, combine work and rest, and if necessary, use medication under the diagnosis of a Chinese medicine practitioner.