As the temperature drops, many elderly people feel cold legs and feet, but also accompanied by numbness or pain in the lower back and legs, which should be alert to whether the lumbar intervertebral disc herniation. Because the spinal column near the distribution of rich sympathetic nerves, when the spinal gap becomes narrow or lumbar disc herniation, sympathetic nerves will be different degrees of pull or compression, so that the lower extremities of the microvascular constriction, resulting in a reduction in blood flow, the phenomenon of cold legs and feet. In addition, usually often do backward walking training, wear flat shoes, foot baths, etc., can also be very good to prevent lumbar disc herniation.