Yellowish greasiness in the middle of the tongue may be caused by liver and gallbladder damp-heat syndrome, spleen and stomach damp-heat (the spleen and stomach feel damp-heat evil qi) and other conditions. It is recommended that patients go to regular hospitals, undergo relevant examinations, identify the cause of the disease, and follow the doctor’s instructions for treatment. 1. Liver and gallbladder damp-heat syndrome: Liver and gallbladder damp-heat syndrome may be caused by factors such as unclean diet, excessive thinking, and unhealthy emotions. Patients may have yellowish color of body and eyes, distension and pain in the abdomen and ribs, or lumps (masses) under the abdomen and ribs, dullness (lack of appetite, reduced food intake), aversion to oil and grease, generalized nausea and vomiting (nausea and vomiting), bloating of the abdomen, red tongue, yellowish greasy moss, and slippery and taut pulse. 2. Damp-heat in the spleen and stomach: Damp-heat in the spleen and stomach refers to the internalization of damp-heat, the elevation of the qi in the middle jiao is out of order, and the dampness of the spleen and the heat of the stomach is overflowing with each other. Symptoms include plumpness in the epigastrium (abdomen) (stomach distension and discomfort), inappetence, vomiting, fatigue and heaviness, body heat, bitter mouth, thirst and lack of drinking, scanty and yellowish urine, or even yellowish facial skin such as orange color, yellowish and greasy tongue, and moistened and numb pulse.