Why does the brain often go blank?

The brain often blank may be related to excessive stress and excessive brain use in study and work, resulting in brain fatigue. It may also be related to excessive tension, anxiety, fear, mental fatigue, excessive thinking. Suffering from cerebrovascular diseases, cerebral blood supply deficiency, cerebral arteriosclerosis, lacunar cerebral infarction, etc., may also show headache, dizziness, drowsiness, and occasional brain blank symptoms. Life often encounter things that do not go well can not be solved immediately, excessive thinking causes brain hypoxia, can also show symptoms of brain blank. Long-term lack of sleep, poor sleep quality, may cause yawning, drowsiness or show a blank brain symptoms during the day. Should do more aerobic exercise, eat more calming food, you can go to the hospital for examination, treatment for the cause.