The yellowish thickness of the root of the tongue indicates that it may be due to liver fire, dampness and heat and other disease mechanisms. However, only from the tongue diagnosis can not determine the specific disease, Chinese medicine diagnosis of disease needs four diagnosis, so if you have the above symptoms, it is recommended to consult a doctor, by the doctor to synthesize the other symptoms, to identify the evidence for treatment. 1. Excessive liver fire: In addition to the yellowish-thickness of the root of the tongue, excessive liver fire usually manifests itself in dizziness, redness of the face, redness of the eyes, bitterness of the mouth, irritability and other symptoms. 2. Dampness and heat: Dampness and heat is a combination of dampness and heat, in addition to yellow tongue coating, accompanied by fever, headache, body weight and pain, abdominal fullness, less food, short and yellow urine, yellow tongue coating, pulse moistening and other symptoms. If the situation of yellow tongue coating continues for a period of time without recovery, you should also go to the hospital as soon as possible to avoid aggravating the condition with the development. In addition, for patients with yellow tongue coating, the daily diet should be light, do not eat too greasy, cold, stimulating food, so as not to aggravate the condition.