"Pain stemming from a kidney infection typically is in the area of the back where the kidneys lie, located to the sides of the spine, just above the hips. Kidney related pain often presents as tenderness in this area. Direct injury or trauma to the back, over the area where the kidneys are located, can cause direct injury to the kidneys themselves, and that is why getting struck in this area is commonly referred to as a 'kidney punch.'"

Discovery Health "Back Pain and Kidney Infection" (http://health.howstuffworks.com/diseases-conditions/pain/back/back-pain-and-kidney-infection.htm)

At The sides Of The Spine But Above Your Hips.