Insufficient blood supply to the brain can cause headaches because the brain, especially the scalp of the brain, is very sensitive to ischemia. Long-term hypertension, hyperlipidemia, diabetes, and frequent smokers can lead to extensive sclerosis of the brain arteries, resulting in the intracranial structures, especially the scalp, being very sensitive to ischemia, so headaches can occur. It is important to go to a regular hospital for examination to identify the causes of cerebral insufficiency. This is because chronic insufficiency of blood supply to the brain can lead to dementia in the future, as well as anxiety, depression, and even stroke, paralysis and other serious consequences. Therefore, early intervention and treatment are needed when cerebral insufficiency occurs.