We usually speak of cerebrovascular patients as a group suffering from cerebral thrombosis or cerebral infarction! In modern medical clinics, people always integrate cardiovascular diseases and cerebrovascular diseases together, call them uniformly and deal with them uniformly. The reason is that they are part of the blood vessels of the whole body, just because the organs they feed are more important, once the problem occurs, it is easy to endanger the life or disability, so, cause extra attention! In fact, if we analyze the anatomy and physiology of cardiovascular and cerebrovascular vessels, we will find that many of our clinical concepts have been deviated in the past, which is why there are a large number of patients with cardiovascular and cerebrovascular diseases. The blood vessels in the brain are an extension of the blood vessels in the neck, so a problem in the neck will affect the blood circulation in the brain. For example, cervical spondylosis, cervical instability, and excessive neck obesity can affect the blood vessels in the neck, causing poor blood supply to the brain and the occurrence of blood clots. In addition, because the sympathetic nerve in the neck innervates the blood vessels in the neck, if the sympathetic nerve is stimulated in any way, it will discharge, causing the blood vessels in the neck to contract, resulting in the blood vessels in the brain to follow the contraction. When the blood vessels in the brain are contracted for a long time, the blood vessels will narrow, and under the action of special vascular spasm factors, cerebral thrombosis will occur. Sympathetic nerves and nerve endings together are widely distributed on the surface of the skin, and sympathetic nerves are very sensitive to hot and cold temperature changes, cold stimulation will cause abnormal discharge of sympathetic nerves, nerve impulses will cause contraction of the effects it innervates, and the blood supply of tissues and organs will be reduced. The neck neck is the most exposed part of the body, and it is easy to feel the temperature change. When the sympathetic nerve in the neck is stimulated by cold, it will send out abnormal nerve impulses, causing vasoconstriction in the neck and the brain, and excessive vasoconstriction will cause cerebral thrombosis. Therefore, paying attention to protecting the nerves in the neck from cold stimulation becomes an important part of preventing cerebral thrombosis. Therefore, in winter, it is necessary to pay attention to keep the neck warm to prevent the neck from being cold stimulated and causing cerebral thrombosis. This is also the reason why some people take seasonal injections to prevent cerebral thrombosis in spring and autumn, and why people from the north rarely have cerebral thrombosis attacks when they go to the south.