“Acute kidney failure occurs when your kidneys suddenly become unable to filter waste products from your blood. When your kidneys lose their filtering ability, dangerous levels of wastes may accumulate, and your blood’s chemical makeup may get out of balance.

Acute kidney failure — also called acute renal failure or acute kidney injury — develops rapidly, usually in less than a few days.”

MAYO CLINIC (https://www.mayoclinic.org/diseases-conditions/kidney-failure/symptoms-causes/syc-20369048)