Whenever there is a problem in the low back such as a herniated disc, the nerve signals generated by the irritation there can cause symptoms down into  the muscles along the nerve pathway that can persist long after the spinal irritation is gone. Low back problems and their resulting issues cause more insurance complaints than any other single condition! Pain in the low back that radiates to the leg is a complex situation, needing a broader view of causes to affect more satisfying treatment and results.