Poria cocos has the effect of detoxification, dispel dampness, fluent joints, for medicine and food substances, moderate consumption can play a certain medicinal effect, but not recommended for long-term use. Poria cocos is sweet and light in flavor, detoxifying and diaphoretic, joint-relieving, and also detoxifying mercury, so it is particularly effective in treating syphilis or syphilis caused by mercurial poisoning, which leads to contracture of limbs, tendon and bone pains, and it is the key medicine for treating syphilis; and it can also be used for treating gonorrhea and leukorrhea (cloudy urine and leukorrhea), itchy eczema and carbuncle, swelling, and poisonous sores and other diseases. Note that people with deficiency of liver and kidney yin should not take it. Poria cocos in water has a limited number of active ingredients, the treatment of disease should be based on the use of medication under the guidance of a physician, do not blindly use their own medication, so as not to delay the condition or produce side effects.