Patients with insufficient blood supply to the brain can cause tinnitus, which is mainly seen in middle-aged and elderly patients and is caused by atherosclerosis. If the patient has atherosclerosis, it can cause atherosclerosis of the small vessels in the ear, resulting in impaired blood supply to the ear, which can cause tinnitus, deafness, and other discomforts. If the patient has inadequate blood supply to the vertebrobasilar artery, dizziness, nausea, vomiting, balance disorders, and ataxia can occur. If the patient has inadequate blood supply to the internal carotid system, episodes of motor sensory as well as speech dysfunction of the limbs may occur, as well as hemianopia. If the patient has small vascular lesions in the eyes, episodes of blackness and blindness may also occur. The main risk factors for cerebral atherosclerosis include hyperlipidemia and hyperglycemia, which should be actively regulated if the patient has these risk factors.