Cervical disc herniation is a syndrome that occurs when a cervical disc degenerates, ruptures, and posteriorly protrudes to compress the spinal cord or nerves. Unlike lumbar disc herniation, the cervical spine has a hook vertebral joint between the vertebrae, and when the disc dehydrates and becomes short, this joint phase contacts, wears and proliferates, the nucleus pulposus of the cervical spine is anterior, the posterior edge of the vertebral body is subjected to more force than the lumbar spine, and cervical spondylotic myelopathy is also more than lumbar disc herniation. The most common cause of cervical disc herniation is cumulative chronic strain injury. It occurs most often in middle-aged or older men and is less often associated with weight-bearing labor injuries. More often it is a postural strain injury, related to our occupation and poor lifestyle habits. For example, lying in bed reading and watching TV. How effective is collagenase chemolysis for cervical disc herniation? The effect of collagenase chemolysis performed under CT guidance for cervical disc herniation is certain. The key is to inject collagenase accurately around the herniated disc, and to pay attention to the indications and contraindications, injection site and drug dosage.