Most of them are caused by functional disorders, and most of them are caused by anxiety, tension and depression, and they tend to have abnormal sound in the brain when they are tired or have bad sleep. The second aspect is that the patient’s head always feels buzzing, which may be caused by cerebral arteriosclerosis and insufficient blood supply to the brain, and the symptoms of cerebral tinnitus can be improved after giving the patient medication to improve blood circulation. The third aspect is to consider carotid cavernous sinus fistula as the cause of cerebral tinnitus, which can be clarified by doing angiography imaging of the head.