Whether acute renal failure will recur or not depends on the original disease to decide: 1, if a patient with nephrotic syndrome has acute renal failure, and the next recurrence of nephrotic syndrome after cure, there will be acute renal failure again; 2, if the patient is because of other factors such as infection, treatment can completely relieve, there will be no recurrence; 3, some patients have hemorrhage after surgery, renal failure if cured If the patient is cured, he is completely well and there will be no recurrence. Therefore, the recurrence of renal failure depends on the original disease, and also on individual differences. Some patients with unremitting renal failure have a relationship with their primary disease. There are also some patients with acute renal failure who have been delayed for a longer period of time or have a poorer type of pathology, then the prognosis is poor and it is not a matter of relapse, but some patients will turn into chronic renal failure. Therefore, for patients with acute renal failure, we must pay attention to the pathology, recovery takes six months, and within six months, we must check the kidney function frequently and avoid the application of nephrotoxic drugs so as not to cause chronic damage.