There can be a wide variety of causes for lower back pain. For instance, repetitive injuries at work, improper lifting techniques, and poor posture are but a few of the more common ones. There are also other things that can be causes of lower back pain such as various illnesses and diseases. Kidney infections are one of the prime causes of lower back pain that often go undiagnosed, ultimately resulting in disastrous consequences. An undiagnosed kidney infection can cause severe damage to a person's kidneys.