Kidneys can become damaged from a physical injury or a disease like diabetes, high blood pressure, or other disorders. High blood pressure and diabetes are the two most common causes of kidney failure. Kidney failure does not happen overnight. It is the end result of a gradual loss of kidney function.

What causes kidney not to function well?

The most common causes of kidney failure are diabetes and high blood pressure. Sometimes, though, kidney failure happens quickly due to an unforeseen cause. When the kidneys lose function suddenly (within hours or days), it's called acute kidney failure (or acute kidney injury).

What are signs that your kidney is not functioning properly?

Signs and symptoms of acute kidney failure may include: Decreased urine output, although occasionally urine output remains normal. Fluid retention, causing swelling in your legs, ankles or feet. Shortness of breath.