There are many reasons why patients experience dizziness, nausea, vomiting, and sweating in the middle of the night, and they should be analyzed in the context of the patient’s onset triggers, underlying diseases, and accompanying symptoms. If the patient is a middle-aged or elderly person with a history of cerebral atherosclerosis and cerebrovascular stenosis. If the symptoms of dizziness, nausea, vomiting and sweating suddenly appear in the middle of the night, it is considered to be caused by cerebral vascular spasm or acute attack of cerebral blood supply insufficiency, and it is recommended that the patient consults the hospital in time for examination and treatment. If the patient is accompanied by unsteady walking and ataxia, it is considered to be caused by cerebellar lesions, such as cerebellar infarction. If the patient has dizziness, nausea, vomiting and sweating in the middle of the night, accompanied by tinnitus and stuffy ears, it is considered to be caused by Meniere’s disease.