Tongue coating yellow thick with teeth marks and bitter mouth is the manifestation of spleen deficiency, dampness and heat, you can take Lian Pu drink, San Ren Tang and other drugs, depending on the condition. 1. Lianpuo drink: it is composed of tempeh, calamus, half-summer, gardenia, rehmannia, thick park, Huanglian, it has the efficacy of clearing away heat and resolving dampness, regulating qi and zhongzhong (regulating the qi of the spleen and stomach to make the function of the spleen and stomach smooth), it can be used for the treatment of the spleen and stomach dampness and heat (the spleen and stomach feel the dampness and heat evil qi) resulting in vomiting, diarrhea, bitter mouth, tongue with reddish yellowish and greasy coating with marks and other illnesses. 2. San Ren Tang: It is composed of almonds, cardamom kernels, coix seed, thick park, white through grass, etc. It has the effect of clearing heat and removing dampness (removing heat and dampness in the body), and can be used for the treatment of yellowish color (yellowish color without luster), fatigue (mental fatigue, body fatigue), bitterness in the mouth, and drowsiness in the head and body (heaviness in the head and limbs) caused by dampness and heat in the spleen. If there are symptoms of yellowish tongue coating with teeth marks and bitter mouth, one should consult the clinician and take the medicine as prescribed by the doctor.