There is no such thing as which four kinds of people cannot eat poria. Poria is a traditional Chinese medicine with strong effects of diuresis (promoting the flow of water to dispel dampness), and is often used to improve conditions such as dysuria (unruly urination), gonorrhea (cloudy urine and leukorrhea), diarrhea, and edema. It should not be used for those who are allergic to the drug. It is also not suitable for those who do not have water-dampness in the body as well as those who have unfavorable urination. It is also not recommended for those who are healthy and do not have any disease, so as not to harm the body. In clinical practice, poria mushroom is often used alone or in combination with several herbs, for example, it is used alone to treat edema from the feet to the abdomen during pregnancy and dysuria (unruly urination). For example, it is used alone to treat edema from the feet to the abdomen and dysuria (unsmooth urination) during pregnancy. For those who vomit and have the disease in the diaphragm, drugs such as poria, atractylodes, and poria can be used. Improper use of Chinese herbs can also cause some harm to the body, so if you want to use poria, you must be guided by a professional Chinese medicine practitioner to avoid discomfort.