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:
- occurs in the lower back; below the waist; or in the upper back, over the spine or between the shoulder blades.
- gets worse with movement.
flank pain that is caused by a kidney infection or a kidney stone:
- is pain felt just below the rib cage and above the waist. flank pain can be on one or both sides of the back.
- may spread to the bladder area or genitals.
- gets worse as the bladder fills.
- does not get worse when a person moves.
flank pain with fever and urinary symptoms may mean a kidney infection (pyelonephritis) is present.