Renal function can be partially restored after impairment. Generally, if for acute renal failure, after correcting aggravating factors, such as controlling hypertension, as well as controlling infection, replenishing renal circulation, and then avoiding nephrotoxic drugs, stopping the use of nephrotoxic drugs, such as aminoglycoside antibiotics, sulfonamides, and the use of contrast agents, hyperalgesia can be recovered. But if for chronic kidney function damage, it is very difficult to recover. At this time, we should pay attention to protect the kidney function, to give patients to remove toxins of Chinese medicine diagnosis and treatment, as well as lowering blood pressure, to control the blood pressure, so that the blood pressure to meet the standard, must be controlled below 130/80mmHg. Avoid electrolyte disorders and renal blood volume deficiency, so as to protect renal function, so that the chronic renal failure process is delayed, away from the dialysis uremic phase.