Lumbar traction is a very popular therapy for treatment of LDH in our country. Patients would be placed in traction with the expectation that stretching of the lumbar area would result in distraction and elongation of the structural elements and resolution of pain. Other physiological effects of lumbar traction including decrease in the intra-disc pressure, relief of muscle spasm , reduction of prolapsed disc and forcing patients to bed rest. Despite favorable outcomes have been reported previously,there are few scientifically rigorous studies in the literature that allow the effect of traction to be distinguished from the natural history of the pathology being treated.