Patients with fluid retention in the body, generally speaking, the common causes are mainly the following: a. Patients with renal insufficiency, at this time, the ability of the kidneys to produce urine is significantly reduced, which will cause a large amount of fluid to accumulate in the body and can not be excreted, when patients are given large doses of rehydration, patients will have excessive water retention in the body, manifested as swelling of the limbs, a large amount of fluid in the chest and abdominal cavity, patients through the intravenous application of prostaglandin, the Patients can improve the damaged kidney function by intravenous application of drugs such as Prostil and Renkang injection, while strengthening diuresis to promote urinary excretion, and if kidney failure occurs patients need timely dialysis treatment to remove excess water from the body. Second, patients with cirrhosis loss of compensation, due to long-term hypoproteinemia in the body, can cause the water in the blood vessels to seep into the tissue spaces, causing water retention in the body, need to give supplemental albumin, strengthen diuretic, promote the excretion of water in the body to reduce the symptoms of water retention.