Insufficient cerebral blood supply can cause cerebral hypoxia, but cerebral hypoxia is not always caused by insufficient cerebral blood supply. There can be various clinical causes of cerebral hypoxia, such as anemia, severe hypotension, chronic mental stress, sleep disorders, etc. It may occur. In addition, it can also be seen in chronic carbon monoxide poisoning or acute carbon monoxide poisoning, and patients with certain food and drug poisoning may also develop cerebral hypoxia. Prolonged cerebral hypoxia may cause demyelination changes in the white matter of the brain, which may lead to memory loss, inattention, inattentiveness, etc. Cerebral hypoperfusion is a disorder of blood supply to the brain caused by various reasons, which can lead to cerebral ischemia and hypoxia, clinically including insufficient blood supply to the vertebrobasilar artery and insufficient blood supply to the internal carotid artery system.