The main cause of chronic pain in the head and occipital region is cervical spondylosis. The basic pathological change of cervical spondylosis is degenerative degeneration of the intervertebral discs. When subjected to the gravitational force of the head and the pulling force of the cephalothoracic muscles, the degenerated disc can undergo limited or extensive bulging in all directions, resulting in narrowing of the intervertebral disc space, overlapping and misalignment of the articular processes, and reduction of the longitudinal diameter of the intervertebral foramen. What are the main factors that lead to chronic pain in the head and occipital region? 1.Physical factors: various causes that can cause intracranial and extracranial inflammation and injury; traction, stretching, displacement and expansion of blood vessels due to mass compression and other reasons; stimulation of meninges; muscle contraction; direct stimulation of sensory nerves innervating the head and face, etc. are all causes of migraine. 2.Neuropsychiatric factors: When the body and mind are stimulated by the external environment, they often produce emotions such as worry and anxiety, which lead to migraine attacks. According to the survey, 84% of patients with depression have migraine symptoms. At the same time, after experiencing various unpleasant or violent emotional stimuli such as anger, anxiety and excitement in life or work, you will feel general discomfort and migraine. 3, dietary factors: consuming too much coffee will make the blood vessels expand and stimulate the nerves to cause migraine; and when eating too cold ice cream, you will also feel headache; drinking too much alcohol and the ethanol in the alcohol acts on the blood vessels, which will also cause headache, these are all headaches caused by improper diet. Experts have calculated that the ranking of food that can easily trigger headaches are: chocolate, alcoholic beverages, raw dairy products, lemon juice, cheese, red wine. 4.Sleep factor: This is the more common cause of migraine. The headache is triggered by the severe lack of sleep, and the stressful work can also cause similar symptoms. Due to the weakening of the intervertebral disc’s tensile strength, when the cervical spine moves, the stability between the adjacent vertebrae decreases and intervertebral instability occurs, the mobility between the vertebrae increases and the vertebrae have mild slippage, followed by osteophytes of the small posterior joints, the hook vertebral joints and the vertebral plates, degeneration of the ligamentum flavum and the collar ligament, chondrogenesis and ossification and other changes.