Medical imaging, which can include special x-rays, and ultrasound tests may be done to show the size of your kidneys and to detect any blockages. A biopsy, a test in which tissue or cell samples are taken and examined, is sometimes needed. Your kidneys may work normally again when the underlying cause is treated. However, if your kidneys do not begin to function soon, dialysis may be needed. In dialysis, a special machine removes waste products and excess fluid from the blood.
Dialysis can be life-saving.
In some cases, the kidneys will begin to function again after several weeks and dialysis can be stopped. In other cases, chronic renal failure develops, which could require long-term dialysis or a kidney transplant. Limiting salt and water intake is important while you are recovering from acute renal failure. If you develop chronic renal failure, you may have to limit your salt and water intake for the rest of your life. Your doctor will give you guidelines based on your condition.