Cerebrovascular problems are often manifested as dizziness. Dizziness is very common, but caused by dizziness of a variety of diseases, must go to the Department of Neurology to do differential diagnosis, because one of the categories is the cerebrovascular disease caused by dizziness, and this kind of dizziness is the most dangerous, serious life-threatening, untimely treatment will leave sequelae. The human brain has two sets of blood supply systems, one is the carotid artery system and the other is the vertebral basilar artery system. Problems in the vertebral basilar artery often lead to dizziness, as in the case of Lao Zhao, who is a typical example of an infarct caused by obstruction of the blood vessels near the tip of the bifurcation of the basilar artery. This kind of cerebrovascular disease caused by dizziness and we often say otolithosis (that is, a benign episodic positional vertigo, mostly due to feel the position of the otolith dislodged caused by one of the most common causes of dizziness) symptoms are very similar to the change of position on the dizziness. It is also easy to be mistaken as a result of poor rest, or mistaken for cervical spondylosis, but if it is cerebrovascular disease, it will develop very quickly, some one or two days, some two or three days will appear one after another with symptoms such as unfavorable speech, unsteady walking, vomiting, unable to see on one side, and even unconsciousness. Once the treatment is late, the blood vessel develops from narrowing to infarction, it will affect the cerebellum, brainstem and thalamus, and once it causes necrosis of the brain cells, it cannot be undone, and it will leave after-effects, so it must be taken seriously. There are also cases of dizziness caused by rupture and bleeding of blood vessels in the cerebellum and brainstem. Dizziness caused by basilar artery problems is slightly different from otolithiasis in terms of symptoms, that is, some patients with otolithiasis are dizzy when they sit up, but they are still dizzy when they lie down, and their symptoms are not relieved, whereas dizziness caused by basilar artery may be alleviated when they lie down. However, he emphasized that everyone has a different degree of sensitivity to dizziness, so it is inaccurate for patients to rely on subtle differences in symptoms to identify the disease, or they should let their doctors identify it. There are also patients with diabetes, dizziness, thought it was high or low blood sugar, endocrinology treatment for many days, there is no relief before coming to see the neurology, the result is cerebrovascular disease. More common is to have high blood pressure, dizziness, thought it is caused by high blood pressure, after the antihypertensive treatment, but the speech is unfavorable, unsteady walking, obviously this is not caused by high blood pressure, but cerebrovascular disease caused by dizziness. There are many reasons for dizziness, which may be cerebrovascular disease, cervical spondylosis, otolithiasis, etc. Some of the dizziness is not life-threatening even if it is severe, and some of them are light, but the consequences are serious. The degree of dizziness has little to do with the degree of risk of the disease, so don’t be careless. If the “three high” people have the symptom of dizziness, we should be alert to whether the vertebral basilar artery system is out of the problem, head CT examination can soon be clear whether the bleeding, if there is a vascular infarction, do an MRI examination can be seen. Do transcranial Doppler ultrasound (TCD) examination can also be changed from the blood flow to understand whether the blood vessel stenosis, but this examination can only be used as a screening reference, is not very accurate, to know whether there is a stenosis of the blood vessel, to check the magnetic resonance angiography or CT angiography, the most accurate examination or to do angiography, but this examination is invasive, generally unnecessary.