White, greasy and thick tongue can be seen as Kidney Cold, which is due to weakness of the kidneys and deficiency of yang qi. White, greasy and thick tongue can also be seen in food accumulation, phlegm-dampness, spleen and kidney yang deficiency (deficiency of yang qi in the spleen and kidneys), and so on. White, greasy and thick tongue, accompanied by distension and pain in the stomach and epigastrium, belching and acid swallowing (swallowing the acid in the stomach that rushes up to the oropharynx), or vomiting of sour and rotten food, with the distension and pain relieved after vomiting, or having loose bowel movements (loose and unformed feces), or diarrhea with sour, rotten and smelly substances, are evidence of accumulation of food. White, thick and greasy tongue, accompanied by coughing and sputum, sticky sputum, fullness in chest and epigastric region, dullness (lack of appetite, reduced food intake), vomiting, dizziness, dizziness, or dizziness, or insanity, phlegm in the throat or numbness in limbs are the signs of phlegm-dampness. A white, greasy tongue with chills (fear of cold, cold limbs), cold pain in the waist, knees or lower abdomen, prolonged diarrhea and dysentery, diarrhea at five o’clock (diarrhea before dawn), diarrhea (stools as thin as water or mixed with indigestible food), dysuria (unruly urination), swelling of the face and limbs, and abdominal distension such as a bulge are signs of Spleen and Kidney Yang Deficiency (deficiency in the yang qi of the Spleen and the Kidneys). White and greasy tongue may be due to accumulation of food, phlegm-dampness, spleen and kidney yang deficiency (deficiency of yang qi in the spleen and kidneys), etc., which need to be judged in conjunction with the patient’s systemic symptoms. The patient should go to the hospital in time for treatment, and should not diagnose or take medication on his/her own.