Cervical spondylosis is a clinical syndrome caused by degenerative degeneration of cervical discs, hypertrophy and hyperplasia of cervical vertebrae, as well as cervical injury, resulting in osteophytes of cervical vertebrae, or prolapsed discs and thickened ligaments, which stimulate or compress the cervical spinal cord, cervical nerves and blood vessels and produce a series of symptoms. The main manifestations are neck and shoulder pain, dizziness and headache, numbness of upper limbs, muscle atrophy, spasm of both lower limbs in severe cases, difficulty in walking, and even paralysis of all four limbs, urinary and fecal disorders, and paralysis. Disease classification (1) Nerve root type: The stimulation of degenerative changes of cervical intervertebral disc or osteophytes compresses the spinal nerve roots, causing sensory and motor dysfunction of the upper limbs, often manifesting as motor impairment or sensory numbness of one upper limb segment. (2) Spinal cord type: cervical disc herniation, ligamentous hypertrophy and ossification or other causes of cervical spinal stenosis, spinal cord compression and ischemia, resulting in spinal cord conduction dysfunction. Some of them start with upper limbs and progress to lower limbs; some start with lower limbs and progress to upper limbs. The main manifestations are unstable walking, numbness of the limbs, and difficulty in urination and defecation. (3) Vertebral artery type: Due to the stimulation of degenerative changes of the hook vertebral joint, compression of the vertebral artery, resulting in inadequate blood supply to the vertebral basilar artery, often accompanied by dizziness, black haze and other symptoms, related to the rotation of the neck. (4) Sympathetic nerve type: The stimulation of degenerative changes of the cervical intervertebral disc, which compresses the sympathetic nerve fibers in the neck and causes a series of reflex symptoms, is clinically rare, and is often mixed with cardiovascular disease and endocrine disease, making it difficult to distinguish. (5) Other types: refers to the esophageal compression type with foreign body sensation in swallowing, which is very rare clinically.