Kidney pain — also called renal pain — refers to pain arising from infection, injury or inflammation of a kidney. You may feel kidney pain as a dull, one-sided ache in your upper back, often accompanied by fever and urinary symptoms.

Some people are surprised to learn exactly where the kidneys are located. Your kidneys are located relatively high in your body, under your lower ribs. It's not unusual to attribute back pain or side (flank) pain to your kidneys. But more often than not, your kidneys probably aren't the cause of your back or flank pain.

May. 05, 2014