Some health problems that affect a kidney can cause pain. You might feel kidney pain as a dull, one-sided ache in your upper stomach area, side or back. But pain in these areas often has other causes that aren't related to the kidneys.

The kidneys are a pair of small organs in the back of the stomach area under the lower ribs. One kidney is located on each side of the spine. It's more common to have kidney pain, also called renal pain, on just one side of the body. Fever and urinary symptoms often happen along with kidney pain.