Definition
Flank pain refers to pain in the side of the trunk between the right or left upper abdomen and the back.
Alternative Names
Pain - side; Side pain
Considerations
Flank pain often means kidney trouble. If flank pain is accompanied by fever, chills, or urinary problems, then a kidney is the likely source.
One in seven people in the US has kidney stones at some time. The pain from a kidney stone is agonizing, comes in sharp stabbing waves or spasms, and usually radiates into the groin.
Causes