Causes of insufficient cerebral blood supply, mainly in the following aspects: First, caused by vascular factors, if the patient has diabetes, hypertension, hyperlipidemia, cerebral atherosclerosis, etc., will lead to patients with carotid artery plaques, which will cause the patient’s cerebral hemodynamics to change, causing the symptoms of insufficient cerebral blood supply. Secondly, it is considered to be related to cervical spondylosis, such as vertebral artery type cervical spondylosis, due to cervical vertebrae misalignment, which will lead to vertebral artery compression, and cause cerebral blood supply insufficiency. Thirdly, it is mainly seen in the heart, the heart is the main factor of pumping blood, if the patient has chronic cardiac insufficiency, heart failure, the function of the heart pumping blood will be reduced, the ejection of blood will be reduced, so that the patient occurs cardiogenic cerebral blood supply insufficiency.