Renal Failure or Kidney Failure is a condition when the kidneys stop working and are not able to remove waste and extra water from the blood or keep body chemicals in balance.
Acute or severe renal failure can happen suddenly (for example, after an injury) and may be cured with treatment.
Chronic renal failure develops over many years, may be caused by conditions like high blood pressure or diabetes. Chronic renal failure may lead to total and long-lasting renal failure, called end-stage renal disease (ESRD).
A person in ESRD needs DIALYSIS (the process of cleaning the blood by passing it through a membrane or filter) or a kidney transplant.