Sudden tinnitus in the middle of the night may be caused by mental factors, cerebral infarction, Meniere’s disease and other reasons. 1. Mental factors: If you are under pressure in life and study, and in a state of high tension for a long period of time, sudden tinnitus in the middle of the night may occur when you sleep. 2. Cerebral infarction: If you suffer from cerebral infarction and the anterior inferior cerebellar artery is blocked or narrowed, tinnitus, vomiting, dizziness and other symptoms may appear suddenly in the middle of the night when you sleep. 3. Meniere’s disease: Meniere’s disease can also lead to sudden tinnitus in the middle of the night, with the inner ear membrane labyrinthine fluid related to the progression of the disease will also have hearing loss, and in severe cases, there will even be permanent tinnitus. There are many other causes of sudden tinnitus in the middle of the night, and it is recommended to consult a doctor in time to avoid delaying treatment.