Thick yellow tongue coating is a prominent manifestation of damp-heat-embedded spleen evidence, which is a manifestation of the accumulation of heat in the body’s stomach and intestines, causing damp-heat to be embedded in the body and the spleen to lose its health. The symptoms include abdominal distension, dullness, body fever, loose and unpleasant stools, sticky mouth, short and yellow urine, sore and heavy limbs, sweating, and heat that does not resolve, accompanied by yellow eyes, itchy skin, and a red tongue with heat. At the same time, there is a thick tongue coating with mucousy and yellowish manifestations. The treatment can be carried out by taking Qing Zhong Tang orally or with Ge Gen Scutellaria Tang to promote the exhaustion of damp-heat in the body and adjust the manifestation of heat in the middle jiao of the body.