Thick and yellow tongue coating mostly suggests that there is dampness and heat in the body, phlegm heat and other causes. Damp heat in the body in addition to yellow tongue, but also manifested as anorexia, bloating, bitter mouth and other symptoms; phlegm heat in addition to yellow tongue, but also manifested as a cough yellow phlegm, sore throat and other symptoms. Damp heat is mostly caused by the usual diet of fat, sweet and thick taste, eating too much meat, desserts and other foods, or the spleen and stomach are not healthy and other causes of internal dampness and heat. Damp-heat in the body is often manifested as anorexia, bloating, bitter mouth, dry mouth, dry eyes, yellow urine, urinary urgency, painful urination, and many other symptoms, and is often treated by clearing away heat and eliminating dampness. Phlegm heat will also appear tongue coating yellow thick performance, phlegm heat in the body will be manifested as coughing yellow phlegm, sore throat, phlegm, phlegm fire disturbing the heart will appear disturbed sleeplessness (the heart of the heat (irritability and sultriness), insomnia symptoms), nausea, dizziness and other symptoms. Specifically what causes the yellow thick tongue, need to be under the guidance of a doctor to diagnose the pulse to see the tongue, according to the usual symptoms of identification, and then choose the appropriate treatment, timely symptomatic regulation.