Paeonia lactiflora and Poria cocos in water has the effects of dredging the liver and regulating qi (regulating stagnation of liver qi), strengthening the spleen and tranquilizing the heart, and inducing diuresis and seepage of dampness (promoting the operation of the water fluid to get rid of dampness), etc. However, when used to soak in water, it may not be able to precipitate out its active ingredients, and it cannot be substituted for the traditional Chinese medicine prescription to cure the disease. White peony is a Chinese herb with the effects of nourishing blood and regulating menstruation (regulating menstrual irregularities caused by blood deficiency), astringing yin and stopping sweating (astringing yin fluids to reduce sweating), softening the liver and relieving pain (treating pains caused by deficiency of liver yin and liver blood), and calming liver yang. White peony is used in treating blood deficiency, menstrual disorders, spontaneous sweating (involuntary sweating during the daytime, aggravated by sweating with slight movement), night sweating (abnormal sweating after going to sleep, sweating stops after waking up), dystocia (pain in the area of the coxae and ribs), abdominal pain, contractural pain in the limbs, and dizziness with headache. Note that Paeonia lactiflora should not be used with Veratrum. Poria is also a kind of Chinese herbal medicine, has the effect of diuresis and dampness, strengthening the spleen and stopping diarrhea, removing paralysis, draining pus, detoxifying and dispersing the toxin and knot, which can be used for oedema and urination, phlegm-drinking vertigo and palpitations (due to the vertigo and palpitations caused by phlegm-drinking and evil qi upstream), spleen deficiency with little food, loose stools (feces that are thin and unshapely) and diarrhea, restlessness of the mind and spirit, and palpitations and insomnia. Therefore, white peony and poria in water can have the effect of dredging the liver and regulating qi, nourishing blood and regulating menstruation, strengthening the spleen and tranquilizing the heart, and inducing diuresis and seepage of dampness. However, the drug soaking water may not be able to analyze its active ingredients, can not replace the Chinese medicine prescription to cure the disease. It is recommended that patients should take Chinese medicine correctly after identification by a professional Chinese medicine practitioner and in accordance with the doctor’s instructions.