I. What is cervical spondylosis Cervical spondylosis is a syndrome of a series of clinical symptoms caused by degenerative degeneration of the cervical disc and osteophytes of the cervical spine. Cervical spondylosis can be divided into cervical type, nerve root type, spinal cord type, vertebral artery type, sympathetic nerve type and other types. Cervical spondylosis often manifests clinically as pain in the neck, shoulder arm, upper back of scapula and anterior thoracic region, arm and hand numbness, muscle atrophy, and even tetraplegia, as well as insomnia, headache and dizziness caused by nerve compression. It can occur at any age, with middle-aged and elderly people over 40 years old being the most common. Cervical spondylosis is characterized by a high incidence, long treatment time and a high risk of recurrence after treatment. Second, the pathogenesis and mechanism of cervical spondylosis Cervical spondylosis is mainly caused by degenerative changes of the cervical intervertebral disc and cervical spine and its accessory structures. 1.Intervertebral disc. Degenerative changes of the cervical intervertebral discs usually start after the age of 30. The nucleus pulposus becomes thin and the intervertebral space becomes narrow, so that the fibrous ring and surrounding ligaments become relaxed and the stability of the cervical spine is weakened, which makes it easier to further strain and degenerative changes. Degeneration of the fibrous ring and narrowing of the intervertebral space make it easy for the disc to protrude posteriorly and laterally. Cervical 4, 5, cervical 5, 6 intervertebral mobility is the largest, stress is also the most concentrated, the most vulnerable to injury. 2, the vertebral body and its accessory structures. When cervical instability is caused by disc thinning, the surrounding ligaments are often stretched by abnormal stresses, causing damage to their attachment points and causing bone growth. The narrowing of the intervertebral space also increases the stress on the posterior and hook joints, causing damage to them and hyperplasia. The segments prone to hyperplasia are cervical 5, cervical 6, cervical 4 and cervical 7 in that order. 3, disc herniation, vertebral body posterior margin hyperplasia, yellow ligament hypertrophy, etc. can cause spinal stenosis, resulting in spinal cord type cervical spondylosis. Hook vertebral joint, posterior joint hyperplasia, and disc protrusion to the lateral posterior can compress or stimulate the nerve root, vertebral artery and sympathetic nerve, causing corresponding symptoms. 4.Vascular factors and chemical factors . The pathogenesis of cervical spondylosis, like lumbar disc herniation, cannot be explained simply by mechanical compression factors, but also by vascular and chemical factors at work, thus causing edema and inflammation that trigger or aggravate neurological symptoms. Common symptoms of cervical spondylosis 1, neck symptoms: neck discomfort and restricted activities, the main neck discomfort are neck pain, neck soreness, neck stiffness and improvement after activities or massage. Suddenly aggravated in the morning, after exertion, improper posture and cold stimulation; “rattling” sound when moving the neck; stiffness of neck muscles; painful points when pressing the neck with hands; “popping” of ligaments when massaging the neck; lack of flexibility in turning the neck, etc. 2.Shoulder symptoms: both shoulders are sunken; the shoulders are sore and swollen; the neck muscles are spasmed, and there is pain when pressing the neck, sometimes the pain is severe; the pain is aggravated by exertion, sedentary and improper posture; 3.Back symptoms: the back muscles are tight and stiff, and improve after activity or massage; there are painful points on the back, and the pressure is obvious; the back discomfort is aggravated by exertion and cold. 4. Head symptoms: Headache, dizziness and insomnia are common head symptoms in patients with vertebral artery-type cervical spondylosis. Some patients have a sense of nausea, and patients cannot raise their heads during acute onset. A few patients have symptoms such as diplopia, eye tremor, tinnitus and deafness.