Cervical spondylosis is a disease in which the cervical spinal canal or intervertebral foramen is deformed and narrowed due to degenerative changes of the cervical spine, which stimulates and compresses the cervical spinal cord and nerve roots, and causes corresponding clinical symptoms, and is most often seen in patients over 40 years old. The symptoms of cervical spondylosis are diverse and complex, with most patients starting with mild symptoms and gradually worsening later, and some with severe symptoms. This is related to the type of cervical spondylosis suffered, but often there are few simple types, and one type is mainly combined with one to several types mixed together, called mixed cervical spondylosis. Cervical spondylosis is classified as follows: 1. Neurogenic cervical spondylosis: due to degenerative intervertebral small joints, hook joint hyperplasia or protrusion of intervertebral discs, the cervical nerve roots are compressed, causing more typical radicular symptoms (numbness, pain), and the scope is consistent with the area innervated by the cervical spinal nerve, often manifesting as pain in the neck, shoulder and one upper extremity, stiffness in the neck, restricted movement, with clear pressure points with radiating pain, upper extremity The clinical manifestations of sensory and motor dysfunction of the upper extremity are different depending on the nerve under compression. 2, spinal cord type cervical spondylosis: due to osteophytes at the posterior edge of the cervical vertebral body, calcification of the posterior collateral ligament, protrusion of the intervertebral disc, and compression of the spinal cord by hypertrophy of the vertebral plate or ligamentum flavum, causing symptoms of spinal cord damage. It is also divided into central type and paracentral type. The central type shows unstable gait, numbness and weakness of the limbs, high muscle tone, spasticity or even ankylosis (mostly in the extensor and adductor muscles), and hyperactive tendon reflexes, mostly without neck pain and sensory disturbances. The paracentral type shows ipsilateral motor and contralateral sensory dysfunction, i.e. sensory-motor separation, accompanied by ipsilateral upper limb neurological symptoms, which is the same as the performance of neurogenic cervical spondylosis. 3. Sympathetic cervical spondylosis: hyperplasia or cervical disc protrusion at the intervertebral foramen or transverse foramen compresses the sympathetic nerve, causing a series of sympathetic symptoms with manifestations, such as eye, eyelid weakness, blurred vision, dilated pupil, pain behind the eye, and lacrimation. Head: cervical dizziness, nausea and vomiting, pain in the head and occiput. Cardiac symptoms: rapid or slowed heartbeat, pain in the precordial region, often mistaken for a coronary heart attack. Sweating disorder: excessive or little sweating on one side of the head, face, neck, hands and feet. In addition, it is often accompanied by tinnitus, deafness, and balance disorders. 4.Vertebral artery type cervical spondylosis: stimulated by hyperplasia or protrusion, resulting in spasm of vertebral artery or mechanical compression causing a series of symptoms caused by the reduction of blood circulation supplying brain tissue, which manifests as cervical vertigo, nausea, tinnitus, deafness, blurred vision, headache, momentary impairment of consciousness and even sudden collapse. The above symptoms are mostly triggered when the neck moves to a certain position. 5.Esophageal type cervical spondylosis: It is less common clinically, mainly the appearance of bone spurs at the anterior edge of the vertebrae, and osteophytes like osteophytes at the anterior edge of the cervical vertebrae compressing the esophagus causing clinical symptoms of dysphagia in patients; or stimulation or compression of the phrenic nerve causing dyspnea, or stimulation or compression of the recurrent laryngeal nerve causing hoarseness, etc., and other corresponding clinical manifestations. The manifestations are throat dryness, pain in the throat, obvious foreign body, swallowing difficulty, hoarseness and other throat and esophageal symptoms. 6.Cervical cervical spondylosis: It is extremely common clinically and is an early manifestation common to all other types of cervical spondylosis. The symptoms are mainly in the neck, so it is also called localized type. Because the symptoms are light, not enough attention is often paid to them, resulting in repeated attacks and aggravation of the disease. This type of cervical spondylosis causes abnormal sensations such as head, neck and shoulder pain with corresponding pressure points because the cervical spine is bent for a long time and part of the intervertebral disc tissue gradually moves to the extension side and stimulates the nerve roots. About half of the patients have limited neck movement or forced position, and individual patients may have transient sensory abnormalities in the upper limbs. The pain increases with activity and can be relieved by rest. These are the common subtypes of cervical spondylosis, and I hope that patients will not miss the best time for treatment because they lack relevant knowledge and do not go to the hospital in time after discovery. Patients with cervical spondylosis should pay attention to maintenance and prevent any triggering factors, such as absolute cessation of smoking and alcohol, prevention of excitement or anger and excessive fatigue. Try to avoid prolonged head down, watch less TV, play less video games, use less computer, cell phone, do not play chess, do not play mahjong, etc.