The early stage of renal failure can be seen in nausea, vomiting, edema, weakness, oliguria and other symptoms. Renal failure is usually caused by impaired renal function due to insufficient blood supply to the kidneys, obstruction of some factors, or long-term renal lesions, with the progression of the disease, the renal function gradually declines, which eventually leads to renal failure. Renal failure can be categorized into acute renal failure and chronic renal failure. There may be no specific symptoms in the early stage of renal failure. Some patients may experience nausea, vomiting, fatigue, etc. In severe cases, edema, oliguria and other symptoms may occur. The early stage of renal failure may also appear other normal, it is recommended that patients go to regular hospitals in a timely manner, under the guidance of the doctor standardized treatment.