The iWorld

If you're feeling pain in your lower back, then you should immediately consult your physician and make sure you aren't ending up with another kidney stone infection.

Pain in your lower back side of the body is the most common and accurate symptom of a kidney stone somewhere in your urinary track. The stone may be in your kidneys, or passing through kidneys to the urinary bladder, or itself in the urinary bladder. If you also feel pain while you urinate, then this is a very strong symptom of some kidney stone in your urinary track. Take an action immediately before the pain intensifies and you have intense unbearable pain in your lower back.

Go to my post on treating kidney stones naturally.