The basic factor of lumbar disc herniation is disc degeneration, but the predisposing factors leading to disc herniation have not been clearly established, but some factors are related to it. (i) Structural factors of the spine Spinal deformities, including symmetrical or asymmetrical displaced vertebrae of the spine, scoliosis; straightening of the physiological curvature of the spine induced by physiological curvature of the spine. Physiological curvature straightening is common in young people who are sedentary for long periods of time. (B) Physiological factors 1. Age The incidence of lumbar disc herniation is highest in middle age 30-50 years. Among the 209 patients in Qingdao Medical College, 64.46% were aged 20-40 years old and 34.92% were over 40 years old, with a trend of continuous rejuvenation in recent years. 2.Height The incidence of lumbar disc herniation is high when men exceed 1.8m, women exceed 1.7m and larger lumbar spine index and obesity. 3, gender The incidence of lumbar disc herniation is more in men than in women, about 2:1, and the incidence of intervertebral disc in the United States is 3.1% for men; 1.3% for women; the incidence in Finland is 1.9% for men and 1.3% for women. (C) race and genetic factors 1, race Indians, Eskimos, black Africans incidence rate is significantly lower than other ethnic groups 2, genetics There have been reports that within 15 years, two or more people in the same family with blood relations were found to have lumbar disc herniation, statistics have 20 households 24 columns, patients with a positive family history, the relative risk of lumbar disc herniation before the age of 21 is estimated to be about 5 times higher . (iv) Occupational factors A group of 57,000 occupational surveys showed that the incidence of the following occupations is high: 1, long-term office desk workers 2, drivers 3, engaged in long-term bending labor 4, long-term weight-bearing 5, long-term standing (v) Trauma factors 1, acute injury: such as lumbar sprain, vertebral slippage, spinal fracture, vertebral compression, etc., can cause the rupture of the disc cartilage plate, so that the nucleus pulposus of the intervertebral disc protrusion. Traumatic factors usually do not cause pain immediately; pain occurs when there is edema and sterile inflammation from nerve compression. Disc herniation in children and adolescents is associated with acute trauma. 2. Exercise: It is generally believed that exercise in general is beneficial to the nutritional supply of the lumbar disc, and it is now recognized that strenuous exercise is associated with degeneration of the lumbar disc. But some sports such as playing tennis, swimming, jogging and cycling are beneficial to the lumbar disc. 3, lumbar puncture: as early as 1935 pease first reported the discovery of disc stenosis after lumbar puncture. Lumbar puncture, a medical treatment, is often due to surgical anesthesia, extraction of cerebrospinal fluid examination, intravertebral contrast examination, etc. (vi) Smoking factors The nutrition of the lumbar intervertebral disc depends on the blood vessels around the disc to provide, the disc is a tissue lacking blood supply, the blood vessels leading to the disc are extremely small, nicotine within the cigarette will cause the blood vessels to constrict, reducing the blood supply to the lumbar intervertebral disc and causing the disc to degenerate. (vii) disease Some diseases can lead to increased atherosclerosis, which affects the lumbar intervertebral disc and causes disc degeneration, most commonly diabetes. (viii) Pregnancy is one of the common causes of lumbar disc herniation, and Laban investigated 49,760 women after delivery with an incidence of 10,000. And it is more frequent in women with multiple pregnancies. The increased load on the lumbar region during pregnancy is the main cause.