Which description best defines referred low back pain?

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Referred pain happens when a stimulus from an internal organ or another area is perceived in a distant location because those nociceptive signals converge on common neurons in the spinal cord and brain mislocalize the origin. In the lower back, pain from visceral structures such as kidneys, pancreas, or pelvic organs can be felt in the lumbar region even though the source is elsewhere. This distinguishes it from muscle strain pain, which is localized to the back itself, and from nerve compression pain, which typically follows a specific nerve root pattern (radicular) and may include neurological deficits. Fracture pain is localized to the fracture site with focal tenderness. Therefore, describing pain as originating from visceral organs or other areas but felt in the lumbar spine best defines referred low back pain.