For the lack of mental clarity and memory loss, it may be caused by ischemic-hypoxic encephalopathy due to insufficient blood supply to the brain, or it may be caused by hypertensive encephalopathy due to high blood pressure, which is mainly due to the lack of oxygen to brain cells caused by the above-mentioned causes, thus causing swelling of brain cells, which can lead to cranial hypertension. The main thing is to actively control the above factors. If the patient has organic lesions in the brain, such as brain tumor, brain hemorrhage, cerebral infarction, encephalitis, traumatic brain injury, the above symptoms can also occur, and the primary disease should be actively treated. It can also appear if the patient has long time sleep deprivation, mental tension and stress, and the main thing is to improve the lifestyle.