How much do we know about lumbar disc herniation? First of all, the definition of lumbar disc herniation: it is due to the degeneration and protrusion of the lumbar intervertebral disc, which stimulates the nerve roots and sinus nerve to produce a series of clinical manifestations, specifically the appearance of pain, numbness, weakness and other abnormal sensory and motor manifestations of the waist and lower limbs. Why are humans susceptible to lumbar disc herniation? We have to start with the anatomy of the intervertebral discs. The intervertebral disc is located between two adjacent vertebrae, there are internal and external, the outer part of the fibrous ring, consisting of multiple layers of annular arrangement of fibrocartilage ring, around the nucleus pulposus, can prevent the nucleus pulposus from protruding outward, fiber tough and elastic; internal nucleus pulposus, an elastic gelatinous material, has the effect of easing the impact. In adults, the intervertebral disc undergoes degenerative changes, the fibers in the annulus fibrosus become thicker, glass degeneration occurs and finally rupture, so that the disc loses its original elasticity and cannot bear the original pressure. In excessive strain, sudden change in position, violent impact, the annulus fibrosus can expand outward, so that the nucleus pulposus can also protrude outward through the fissure of the ruptured annulus fibrosus, which is called disc herniation.