Why does the brain lack blood supply?

There are many causes of insufficient blood supply to the brain. For example, patients with cerebrovascular diseases show blood vessel wall thickening and blood vessel stenosis due to cerebral vascular diseases. There are also some patients with symptoms of insufficient blood supply to the brain caused by cervical spondylosis. Due to prominent lesions in the neck joint pressing the vertebral artery, this situation will show insufficient blood supply to the brain, showing dizziness, headache, nausea and vomiting. There are also some patients who will show head dizziness when they turn around, or just lie down, accompanied by arm numbness and finger numbness. In this case, patients must pay more attention to keeping warm to prevent catching cold and cold. To eat less irritating food, but also eat less greasy food, to the regular hospital to clarify the cause of symptomatic treatment.