Poria cocos is used as a decoction. The effective dose of Tu Fu Ling in water is limited, and it is not recommended to take this product using the infusion method. Poria cocos is flat in nature, sweet and light in flavor, and belongs to the liver and stomach meridians. It has the basic efficacy of detoxification, removing dampness and facilitating the joints. It is suitable for syphilis, mercury poisoning, and a variety of diseases caused by dampness-heat underflow (dampness and heat evils invading the intestines, bladder, pubic area, lower limbs, etc.) or embedded in the skin. If treating heat drenching (burning and stinging pain is obvious when urinating, accompanied by frequent urination and urgency, and discomfort of traction in the abdomen), it can be combined with Psyllium, Mouton and Talc; if treating dampness-heat subluxation of the belt, it can be combined with Phellodendron Bark and Bitter Ginseng. If the treatment of eczema, itching, can be used with white fresh skin, bitter ginseng and so on. The adverse reactions and contraindications of Tu Fu Ling are not clear. Tea substitute can play a limited medicinal effect, can not replace the drug treatment of disease. Discomfort should seek medical attention in a timely manner, under the guidance of the doctor to choose medication, not self-medication.