Poria as a medicinal herb, soaked in water to drink has the effect of inducing diuresis and seepage of dampness (to promote the flow of water to dispel dampness), strengthening the spleen and tranquilizing the heart. Poria is the dried mycelium of Poria cocos, a fungus of the family Poriaceae, with a sweet, light flavor and flat nature, and its effects are diuresis and seepage of dampness, strengthening the spleen and tranquilizing the heart. It can be used to treat or improve edema and urination, phlegm-drinking palpitations (due to phlegm-drinking evil qi upstream caused by dizziness and palpitations), spleen deficiency with little food, loose stools (feces thin and unshapely) and diarrhea, restlessness of the heart and mind, palpitations and insomnia, and so on. Poria cocos in water also has the above effects, but soaking is not the same as decoction, can be analyzed less medicinal active ingredients, the efficacy is limited to play, can not play a better role in treating diseases. If there is a need for treatment, it is recommended to standardize the use of Chinese herbs under the guidance of a doctor’s diagnosis, to avoid mistakes that can cause damage to the organism.