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Acute kidney failure is when your kidneys stop working suddenly. Doctors sometimes call it acute renal failure. It can happen over just a few hours or days.Acute kidney failure isn’t always permanent. If you get treatment right away and if you don’t have other serious health problems your kidneys can go back to working normally. The main job of your kidneys is to filter waste out of your blood. They also remove extra fluid from your blood (this becomes urine) and control blood pressure. Kidneys help make red blood cells. They regulate electrolytes (a type of nutrient) and activate vitamin D, too. Kidneys don’t work well when they’re damaged. This could happen because of another health condition, like diabetes. A decrease in kidney function that happens over a longer period of time is called chronic kidney disease (CKD).
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