Dizziness during sleep is considered to be caused by insufficient blood supply to the cerebral arteries. The main causes are as follows: 1. Insufficient blood supply to the cerebral arteries, such as abnormal blood pressure, abnormal blood lipids, cerebral vascular spasm, etc. Dizziness may develop into cerebral infarction. Drink more water, eat a low-salt, low-fat diet, eat more vegetables and fruits, and monitor blood pressure and blood lipids. 2. Cervical spine disease is a degenerative change of the cervical spine, and the symptoms of dizziness are caused by insufficient blood supply to the vertebral basilar artery. It can also cause neck discomfort, limb numbness and other uncomfortable symptoms.3. Vertigo, such as otitis media, otoliths, etc. Vertigo with a rotational sensation, aggravated by activity, caused by impaired vestibular function, such as cerebellar infarction, anemia, etc., can also cause dizziness, it is best to further examine and confirm the diagnosis, usually do not stay up late and avoid overexertion.