Causes of disc herniation include: 1, degenerative disc disease: the human body from the age of 20 years, the intervertebral disc water content decreases, gradually appearing degenerative disc disease, the intervertebral disc fibrous ring rupture, the nucleus pulposus protrusion lead to nerve or spinal cord compression, so that the corresponding clinical symptoms; 2, chronic strain: cervical disc herniation and long-term low head, no exercise, pillow too high, mostly occur in the cervical 4-5, cervical 5-6, cervical 6-7; lumbar disc herniation and sedentary, lack of physical exercise, etc., mostly occur in the lumbar 4-5, lumbar 5-sacral 1.