Dizziness, brain swelling and desire to sleep may be caused by lack of sleep at night. When blood pressure is too high, it may cause hypertensive encephalopathy, which can lead to ischemia and hypoxia in the brain and can cause increased intracranial pressure, which can also lead to the above symptoms, as well as memory loss, lack of concentration, etc. The main treatment is to regulate blood pressure, generally applying long-acting agents, commonly used drugs include levloclodipine, amlodipine besylate, irbesartan, valsartan and candesartan. Drugs to improve cerebral metabolism can be applied if necessary, and commonly used drugs include olacetam, piracetam, and cytidylcholine. In case of increased intracranial pressure, cranial pressure-lowering therapy should be given, usually with mannitol, glycerol fructose and tachyphylaxis, etc. It may also occur when there is inadequate cerebral blood supply, and common causes include severe hypotension and severe hypovolemia. It may also be caused by cerebral atherosclerosis, which usually occurs in middle-aged and elderly people, and most patients have hyperlipidemia and diabetes mellitus, among others.