Kidneys are vital organs that clean the blood.
Most of us are born with two kidneys — organs shaped like kidney beans each about the size of a fist located near the just below the rib cage, one on each side of the spine.
These vital organs remove excess fluid and waste from your blood. They are essentially nature's recycling centers. Each day a person's kidneys sift through about 200 quarts of blood and filter out some 2 quarts of waste and extra water, according to the National Institutes of Health (NIH). That waste and water exits the body in your urine.
Each kidney contains about a million so-called nephrons, the tiny units that remove waste from the blood. Most kidney diseases involve damage to the nephrons, causing them to lose their filtering capacity. When kidneys lose this filtering ability, dangerous levels of fluid and waste accumulate in the body, resulting in kidney failure.
The two most common causes of kidney disease are diabetes and high blood pressure, according to NIH.