Hearing a ringing inside the head may be cerebral tinnitus, which is a manifestation of cerebral atherosclerosis and occurs mostly in middle-aged and elderly people. If the patient has diabetes, hypertension, hyperlipidemia and hyperhomocysteinemia, it can easily cause cerebral atherosclerosis. Patients with cerebral atherosclerosis generally have narrow lumens, stiff walls and poor vascular elasticity, and when blood flows through the vessels, it may hit the vessel walls and the patient may feel a ringing sound. If necessary, neck vascular ultrasound, head and neck CTA, cranial magnetic angiography or angiography can be examined to clarify the condition of blood vessels. If the patient has atherosclerosis, oral vitamin E and Ginkgo biloba drops can be taken to soften blood vessels and improve blood circulation, and anti-platelet aggregation drugs, such as aspirin, can also be applied. If aspirin is not tolerated, clopidogrel can also be applied to prevent the patient from progressing to cerebral infarction.