Definition of cervical spondylosis: Cervical spondylosis is a series of clinical symptoms and signs manifested by the compression of the spinal cord, nerves, blood vessels and other structures caused by degenerative changes in the cervical spine and secondary intervertebral joints. We often say cervical spondylosis, according to the clinical manifestations are generally divided into five types: cervical type (also known as muscular cervical spondylosis): the main problem is cervical myofasciitis (i.e., due to acute trauma, chronic strain, environmental, psychological and other factors leading to the aseptic fasciitis of cervical myofascia), which in turn caused by the neck, shoulder and back of the chronic pain. It is usually aggravated when you get up in the morning or when the weather suddenly cools down, as well as when the neck is partially cooled. The pain is usually relieved by activity or heat, but is often recurrent. Imaging is usually unremarkable. Neurogenic cervical spondylosis: It is caused by a herniated cervical disc or osteophytes that irritate and compress the nerve roots. It starts with localized pain in the neck and shoulders, which worsens in a short period of time and radiates to the upper limbs. There may be sensory abnormalities such as numbness and hypersensitivity of the skin, as well as weakness of the upper limbs and inflexibility of the fingers. When the posture of the head or upper limbs is not proper, or when the posture of the upper limbs is suddenly changed, there may be acute sharp pain like “electric shock”. Spinal Cervical Spondylosis: This is caused by compression of the spinal cord. Usually there is numbness and stiffness in the upper or lower limbs, and a feeling of stepping on cotton under the feet, which makes the ground feel insubstantial. It is often accompanied by impaired sense of touch, chest girdling (the feeling of being strangled by something strapped to the chest), and deterioration of fine motor skills of the hands (e.g., trembling in writing, weakness in holding things, and frequent dropping of objects in the hands, etc.). In later stages, urinary and fecal dysfunction such as frequent or difficult urination and defecation may even occur. Sympathetic cervical spondylosis: The main manifestation is sympathetic nerve stimulation symptoms. For example, headache, migraine, dizziness, especially when the head turns. It may be accompanied by nausea and vomiting, vision loss, hearing loss, tinnitus, arrhythmia, rapid heartbeat, and so on. Or sympathetic inhibition type of symptoms: such as dizziness, tearing, nasal congestion, bradycardia, decreased blood pressure or even gastrointestinal gas, etc., can be caused by cervical spine problems. Vertebral artery type cervical spondylosis: The vertebral artery is compressed, which leads to various problems. For example, tinnitus, hearing loss, visual impairment, and slurred speech. Even sudden collapses due to sudden vertigo. Because the vertebral artery is surrounded by sympathetic nerves, it produces symptoms similar to those of sympathetic cervical spondylosis. If there is another type, it is a mixed cervical spondylosis in which two or more of the above types are compounded.