If you experience thigh pain when bending over, you should consider the presence of lesions such as lumbar disc herniation. Long-term bending, weight bearing and aging of the human body, the lumbar spine gradually degenerative changes, the lumbar intervertebral disc will rupture under the stimulation of stress, the nucleus pulposus tissue will protrude from the fissure, most of the time to the posterior spinal canal, the spinal canal has the nerve structure governing the sensation and movement of the lower limbs, the nerve compression by the nucleus pulposus will produce neurological symptoms, manifesting as radioactive pain, soreness, numbness and other sensations in the lower limbs. Sometimes it may cause lower limb muscle strength loss, abnormal bowel movement and other manifestations. Normally, attention should be paid to reducing the weight of the lumbar region and strengthening the functional exercise of the lumbar back muscles to delay the occurrence of lumbar spine degeneration.