The cold winter is coming, many people’s lumbar disc herniation look to aggravate again, so why does lumbar disc herniation occur in winter? 1, the anatomical factors of the lumbar intervertebral disc weakness. The lumbar intervertebral disc is located between two vertebral bodies, a structure with hydrodynamic properties, consisting of three parts: nucleus pulposus, fibrous ring and cartilage plate, the thickness of the entire lumbar intervertebral disc is 8 mm ~ 10 mm. lumbar intervertebral disc is very fragile, its own weaknesses are very obvious: (1) the posterior lateral fibers of the intervertebral disc, the ring is weaker, and the posterior longitudinal ligament is significantly reduced in width at the plane of lumbar 5 and sacral 1, the fibrous ring of strengthening effect is significantly weakened. (2) congenital anomalies of the lumbosacral segment: deformities of the lumbosacral segment can increase the incidence, and these anomalies cause unequal widths of the vertebral spaces and often result in joint protrusion and more rotational strain on the joints, resulting in variable pressure on the fibrous rings and accelerated degeneration. (3) The intervertebral disc gradually lacks blood circulation and has poorer repair capacity after adulthood, especially after degeneration has occurred, and the repair capacity is even weaker. 2, degenerative changes in the lumbar intervertebral disc The so-called degenerative changes in the lumbar intervertebral disc, that is, due to the compression of the intervertebral disc by weight, coupled with the waist and often bending, back extension and other activities, easy to cause extrusion and wear of the intervertebral disc, especially the lower lumbar intervertebral disc, resulting in degenerative changes. The above is about the causes of lumbar disc herniation, I hope to help you, the winter temperature is low, for the lumbar spine is not good for people warm measures is particularly important!