The buzzing sound in the head while sleeping is considered to be tinnitus, which can be caused by many reasons. Clinically, most of the tinnitus is caused by functional diseases and belongs to brain nerve dysfunction. Patients always say that there is an abnormal sound in their head, especially at night, and it affects their sleep, making them feel irritable with memory loss and dizziness. The most common causes of cerebral tinnitus are cerebral arteriosclerosis and cerebral vascular stenosis, which can be clarified by transcranial Doppler.