Flank pain is pain in one side of the body between the upper belly area (abdomen) and the back.
Pain - side; Side pain
Flank pain can be a sign of a kidney problem. However, since many organs are in this area, other causes are possible. If you have flank pain and fever, chills, blood in the urine, or frequent or urgent urination, then a kidney problem is the likely cause. It could be a sign of kidney stones.
Landry DW, Bazari H. Approach to the patient with renal. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 116.
McQuaid K, Proctor DD. Approach to the patient with gastrointestinal disease. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24thed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 134.
Millham FH. Acute abdominal pain. In: Feldman M, FriedmanLS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 10.
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.