Insufficient blood supply to the brain does not usually cause high blood pressure, on the contrary, high blood pressure may appear insufficient blood supply to the brain. There are many factors that cause insufficient blood supply to the brain, the most common disease is cervical spondylosis (especially vertebral artery type cervical spondylosis), the vertebral artery is one of the main blood vessels supplying blood, once compressed or vascular malformation, it will cause insufficient blood supply to the brain. Hypertension, hyperlipidemia, cerebral atherosclerosis caused by the carotid artery plaque will also change the state of blood flow in the brain, resulting in insufficient blood supply to the brain, patients with chronic heart failure, the heart pumping function decreases, the effective ejection fraction decreases, can also lead to cerebral ischemia. In addition, insufficient blood supply to the brain will appear in the brain blood vessels suddenly blocked, in order to ensure the perfusion of brain tissue, the body will be compensatory blood pressure rise, which is an acute hypertensive stress state, not hypertension. Cerebral blood supply insufficiency will appear in dizziness, headache, vertigo, distraction, insomnia and anxiety, numbness of one side of the face, hands and feet, limb weakness or stiffness and other symptoms. For chronic cerebral blood supply insufficiency, early intervention is of significance in preventing ischemic stroke, vascular dementia and other diseases, and also actively searching for the cause of cerebral blood supply insufficiency is the key to treatment. The presence of related symptoms suggests early consultation to avoid delaying the condition.