Hemodialysis is a treatment mode and not a specific disease. Hemodialysis mainly targets uremia. When kidney disease develops to this stage, many symptoms will appear clinically, like edema, chest tightness, weakness, nausea, vomiting, itchy skin, etc. It is necessary to rely on renal replacement therapy, such as hemodialysis, which generally needs to be done three times a week for four hours each time to remove excess water and metabolic waste from the body and maintain a stable internal environment. During the time of dialysis, it is important to monitor the changes of the condition, and to get a comprehensive understanding of the physical condition by checking the indicators of kidney function, blood pressure, blood routine, electrolytes and parathyroid hormone, and adjust the treatment plan according to these test results. In daily life, attention should be paid to controlling salt and water intake to avoid increasing body burden.