Yellow, thick and greasy tongue coating is not necessarily dampness and heat, there may also be phlegm-heat and summer dampness. 1. After the dampness is blocked, it causes the stomach qi not to descend and the spleen qi not to rise, and the defilement is manifested on the tongue, producing thick moss. There is heat in the body, which causes the tongue moss to become yellow, and under the combined effect of dampness and heat, the tongue moss becomes yellow and thick and greasy. There will also be stomach pain, vomiting, burning in the stomach, sticky stools, yellow urine, etc. Qingzhong Tang can be taken to clear dampness and heat, and the adverse effects and contraindications are not exact. 2. Phlegm and turbidity stagnation, the qi is not smooth, it will lead to thick moss or greasy moss, heat in the body leads to yellow moss, phlegm and heat together lead to yellow thick and greasy tongue, manifestations of insomnia, phlegm, vomiting, dizziness, etc., you can take Huanglian Wengdian Tang to clear phlegm and heat, the adverse effects and contraindications are not exact. 3. Dampness leads to thick or greasy moss, and summer heat easily colludes with heat, leading to summer heat, resulting in yellow moss, which together lead to yellow, thick and greasy tongue coating, and there will be fever, excessive sweating, irritability, thirst and other manifestations, you can take Liuyi San to clear the summer heat, and the adverse effects and contraindications are not exact. Taking the above medications requires a doctor’s guidance.