Back pain is the second leading cause of work absenteeism (after upper respiratory tract complaints) and results in more lost productivity than any other medical condition. The lifetime prevalence of back pain exceeds 70% in most industrialized countries,and the 1-year prevalence for an episode of acute low back pain (LBP) has been estimated to be 65%. Sciatica is present in about 25% of those with LBP, and one of the major cause of sciatica is herniation of intervertebral disc (HIVD) of the lumbosacral spine or lumbar disc herniation (LDH). In the United Kindom, the estimated prevalence of LDH is from 1% to 3%. Although 95% of LBP patients recovered in 12 weeks, recurrent pain and disability were common and occurred in 12% over the 18-month observation period.