Tongue coating symptoms of liver disease vary according to the type of evidence. 1. Tongue symptoms of Liver Qi Stagnation (Liver Qi not flowing smoothly) syndrome are pale tongue with white fur and greenish color on both sides. Accompanying symptoms include distension and pain in both hypochondriacs, pain that fluctuates according to emotions, and a stringy pulse. 2. Liver Depression and Fire (Liver qi is not flowing smoothly, resulting in the production of fire and heat): red tongue with yellow coating. Accompanying symptoms include irritability, thirst, and slippery pulse. 3. Liver and gallbladder dampness-heat (dampness-heat evil qi is deposited in the liver and gallbladder) is characterized by red tongue and yellow, thick and greasy moss. Accompanying symptoms include thirst, short, astringent and yellow urine, and slippery pulse. 4. Liver-Yang Hyperactivity (excessive liver-Yang, causing dizziness, dizziness, headache, etc.) Symptoms of tongue coating are red tongue with yellow coating. Accompanying symptoms include heartburn, irritability, dizziness, and slippery pulse. 5. Liver and kidney yin deficiency (deficiency of yin in the liver and kidneys) is characterized by red tongue with little or no coating. Accompanying symptoms include lumbar and knee tenderness (a feeling of soreness and weakness in the waist and knees), dizziness, tinnitus, and a slow and heavy pulse. If the tongue texture and tongue coating changes are inconsistent, the etiology of the disease is more complex and needs to be analyzed comprehensively through the clinician’s four diagnosis. If there is any abnormality in the liver, it is necessary to consult a doctor in a timely manner to clarify the cause of the disease, so as not to delay the condition.