Dizziness and lightheadedness may be due to insufficient cerebral blood supply, or it may be caused by physiological factors such as lack of sleep and excessive mental stress. Insufficient cerebral blood supply is a more common clinical cerebrovascular disease, which is clinically known as cerebral ischemia. This disease is mainly due to the existence of patients with vertebral artery-type cervical spondylosis, chronic heart failure and other underlying diseases, resulting in cerebral arteries to the brain blood supply is lower than the brain’s normal demand, often leading to patients with dizziness, headache, blurred vision, numbness of the limbs and other symptoms, so dizziness, dizziness may be the result of insufficient cerebral blood supply. However, there are many clinical reasons for dizziness and lightheadedness, and not all dizziness and lightheadedness are caused by insufficient blood supply to the brain. First of all, if the patient is often staying up late due to the need of work and study, resulting in lack of sleep, or long time under tension, anxiety and other emotions, excessive mental stress, dizziness and lightheadedness may also occur. Secondly, diseases such as high blood pressure can also cause dizziness and lightheadedness. It is recommended that patients with recent symptoms of dizziness and lightheadedness should first seek medical examination to clarify the specific cause of the disease.