Uremic patients try to control drinking water, the following specific analysis: uremia is the end stage of chronic renal failure, renal failure after reaching the uremic stage, the effective kidney units are significantly reduced, the kidneys produce and discharge urine function is lost, so the excess water in the body can not be discharged, there is double lower limb edema, or even generalized swelling. If patients with uremia cannot control their water intake, the patient’s water and sodium retention becomes more serious, which in turn affects other organ functions. For example, patients with heart failure can lead to chest tightness, breathlessness, inability to lie down, hearing a lot of dry and wet rales in both lungs, coughing up red foamy sputum, etc. Therefore, patients should try to control water consumption to avoid water and sodium retention when they reach the stage of uremia, and if necessary, they can be treated with hemodialysis.