Poria bark is the outer skin of Poria cocos, from the perspective of traditional Chinese medicine, its nature is flat, sweet taste, light, belonging to the lungs, spleen, kidney meridian, and its main role includes diuresis to eliminate edema and strengthen the spleen and seepage of dampness. First of all, it can be used to treat a series of diseases in which water and dampness are retained within the human body, the most common diseases include glomerulonephritis, nephropathy resulting in urinary incontinence, which is manifested as edema of the lower limbs, and is accompanied by lumbar soreness and lumbago. It can also be used to treat lower urinary tract obstructive diseases, such as male prostate hyperplasia, female bladder neck obstruction caused by urinary discharge difficulties, urinary disadvantage, some patients can also manifest as urinary frequency, urinary urgency, these diseases can be treated with Poria bark. In addition, Poria bark also has a very good role in strengthening the spleen and seepage of dampness, can be used to treat patients with spleen deficiency and dampness, such patients manifested as a lack of appetite, after eating the stomach and abdomen distension and discomfort, some patients will appear after meals, nausea, vomiting, and even some patients appeared to spit out white mucus foam, simply put is more saliva, such patients are often loose stools, shapeless, and there are a lot of patients with sticky stools, relatively sticky toilet, for such patients, the stool is often loose. More sticky toilet, for such patients can be used Poria bark for treatment, the above is the main efficacy and role of Poria bark.