Answer:
The kidneys can improve over a period of months.
Step-by-step explanation:
Acute renal failure is the sudden loss of the ability of your kidneys to filter waste, salts and fluids from the blood. When this happens, the waste can reach dangerous levels and affect the chemical composition of your blood, which may be out of balance.
It is usually possible to treat the causes of acute renal failure and stabilize the patient. The treatment may last a few days or months. These people's kidneys will work well enough that they can lead normal lives.
But other people can suffer serious kidney damage, even causing chronic kidney failure. Some of these people may need regular dialysis or a kidney transplant. However, it is possible to recover with proper treatment.