Depending on the tissues and structures involved, cervical spondylosis is divided into: cervical (also known as soft tissue), radicular, spinal, sympathetic, vertebral artery, and other types (currently mainly referring to the esophageal compression type). If two or more types exist at the same time, it is called “mixed type”. Cervical cervical spondylosis is caused by acute or chronic injury to the neck muscles, ligaments and joint capsule, degeneration of the intervertebral disc, instability of the vertebral body and misalignment of the small joints, as well as by wind and cold, cold, fatigue, improper sleep posture or inappropriate pillow height, which causes over-extension or over-flexion of the cervical spine and strain or compression of certain muscles, ligaments and nerves in the neck and collar. It mostly develops at night or in the morning, and has the tendency of natural remission and recurrent attacks. 30-40 years old women are more common. Neurogenic cervical spondylosis Neurogenic cervical spondylosis is caused by irritation and compression of cervical nerve roots in the spinal canal or intervertebral foramen due to disc degeneration, herniation, segmental instability, osteophytes or bone redundancy formation. It has the highest incidence among all types, accounting for about 60-70%, and is the most common type in clinical practice. It is mostly unilateral and single-root onset, but there are also bilateral and multi-root onset cases. It is most common in people aged 30-50 years and usually has a slow onset, but there are also cases with acute onset. There are more men than women. The incidence of spinal cord cervical spondylosis accounts for 12-20% of cervical spondylosis and has a high disability rate because it can cause limb paralysis. It usually starts slowly and is more common in middle-aged people aged 40-60. When combined with developmental cervical spinal stenosis, the average age of onset is younger than that of patients without spinal stenosis. Most patients have no history of cervical trauma. Sympathetic cervical spondylosis is caused by factors such as disc degeneration and segmental instability, which cause stimulation of sympathetic nerve endings around the cervical spine and produce sympathetic nerve dysfunction. Sympathetic cervical spondylosis has a wide range of symptoms, most of which are sympathetic excitation symptoms and a few are sympathetic inhibition symptoms. Since the surface of the vertebral artery is rich in sympathetic nerve fibers, when sympathetic nerve dysfunction occurs, the vertebral artery is often involved, resulting in abnormal diastolic function of the vertebral artery. Therefore, sympathetic cervical spondylosis is often accompanied by inadequate blood supply to the vertebrobasilar system along with symptoms of several systems in the body. When a normal person’s head is tilted or twisted to one side, the vertebral artery on the same side is squeezed and the blood flow of the vertebral artery is reduced, but the vertebral artery on the opposite side can compensate, thus ensuring that the blood flow of the vertebrobasilar artery is not greatly affected. When segmental instability and narrowing of the intervertebral space occur in the cervical spine, the vertebral artery can be distorted and compressed; the vertebral artery can be compressed directly by the vertebral edges and the bony bulge at the hook vertebral joint, or the sympathetic nerve fibers around the vertebral artery can be stimulated, resulting in spasm of the vertebral artery and instantaneous changes in vertebral artery blood flow, leading to inadequate blood supply to the vertebrobasilar system and resulting in symptoms.