Kidney infections may occur in one or both kidneys.

The kidneys remove waste from the body through urine. They also balance the water and mineral content in the blood. An infection may prevent them from working properly.

Anatomy of the Kidney
Glomerulonephritis
Copyright © Nucleus Medical Media, Inc.

Kidney infections are caused by a bacteria. The specific type of bacteria can vary. The bacteria most often comes from an untreated bladder infection.