Kidney Pain can be because of a lot of different reasons.
Kidney pain can occur due to an: + injury, + enlargement of the kidney, + infection or inflammation.
Pain from the kidneys incline in the lower back or the flank region, just under the ribs and it can extend up to your testicles. Pain due to arthritis, muscle strain or spinal problems can be mistaken for some problem in the kidneys. Infection in the kidney and kidney stones are the root cause of kidney pain.