Acute renal failure recovery time and the number of dialysis are not necessarily related to the type of disease and their own situation. If patients with acute renal failure have oliguria, anuria, or rapid rise of creatinine, hyperkalemia, etc., they need dialysis treatment to maintain the stability of the internal environment of the body, at this time, dialysis is only a symptomatic treatment, so that the kidneys can get enough rest, not for the cause of the disease, so purely dialysis treatment can not make the acute renal failure completely recovered. The treatment of acute renal failure also needs to target the primary disease, such as pre-renal acute renal failure caused by the reduction of effective circulating blood volume, need to carry out rehydration and other related treatments; obstructive nephropathy caused by post-renal acute renal failure need to release the obstruction, etc.; active correction of the reversible factors, the recovery of acute renal failure is possible. Patients with acute renal failure are advised to go to regular hospitals in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of doctors.