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By Mayo Clinic staffKidney pain is caused by infection of or injury to the kidneys themselves. If your back or flank hurts, you might understandably think you have kidney pain, but your kidneys are probably just fine. In fact, many people are surprised to learn that kidneys are located relatively high on the back, just under the lower ribs.
How do you know if what you're calling kidney pain actually is kidney pain? There's no sure way, but the likelihood that it is increases with the presence of other signs and symptoms.
Pain in the upper back that is a dull, one-sided ache, particularly if it is accompanied by fever and urinary symptoms, may be real kidney pain, due to a kidney infection (pyelonephritis).
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