Tooth marks on the side of the tongue may be caused by dampness, spleen deficiency, dampness, heat and phlegm, etc. In addition, there are some tooth marks on the tongue that are congenital and not pathologic. 1. Dampness: People with predominantly dampness have a tongue with teeth marks, which is often accompanied by a pale, fat and slippery tongue. If it is because of the body’s Yang deficiency, can not warm the water, resulting in the body’s water metabolism disorders, which led to the aggravation of the body’s dampness. 2. Spleen deficiency: If the spleen is weak, qi deficiency crowd tongue coating with teeth marks, there will be a tongue light red, tender symptoms. This group of people also have moisture in the body, but not as obvious as the former, mainly in the spleen deficiency. 3. Damp-heat phlegm: Damp-heat phlegm crowd tongue coating with teeth marks, mostly seen in the tongue red and swollen full of mouth. Mostly seen in people who often drink alcohol, like to eat fat, sweet and thick flavors, dampness into the body, the symptoms will be manifested in the teeth and tongue. 4. Some people also have teeth marks on their tongue under normal physiological state, which is congenital and needs no treatment. The symptoms of teeth marks on the side of the tongue, it is recommended to go to the hospital in a timely manner, under the diagnosis of the doctor to see whether it is caused by pathological factors.