It is sometimes hard to tell the difference between back pain that is caused by a bone or muscle problem and back pain (flank pain) that is caused by a kidney or bladder infection or a kidney stone.
Back pain that is caused by a bone or muscle problem:
Flank pain that is caused by a kidney infection or a kidney stone:
Flank pain with fever and urinary symptoms may mean a kidney infection (pyelonephritis) is present.
Primary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency Medicine
Specialist Medical ReviewerDavid Messenger, MD
Current as ofMay 22, 2015
WebMD Medical Reference from Healthwise