Ninety percent people having back pain in life time incidence in which fifty percent recover by 2 weeks and ninety by 6 weeks , two to seven develop chronic pain cause of low back pain dysfunction of intervertebral joints is seventy percent , spondylosis ten percent , disc pathology ten percent and ninety percent of disc pathology respond to aggressive conservative therapy, one to three percent need surgery in which patients included are failure of conservative therapy, progressive neurological deficit, cauda equina syndrome.