What Kidneys Do
Your kidneys are two fist-sized organs found below the ribs on both sides of your spine. They are shaped like kidney beans and are about the size of your closed fist.
Kidneys help the body get rid of waste and fluids. Occasionally people are born with one kidney, or lose a kidney during life, and still maintain normal overall kidney function. It’s when both kidneys are affected by kidney disease that treatment is necessary.