Dizziness and numbness of the mouth may be due to insufficient blood supply to the brain. Cerebral insufficiency of blood supply refers to ischemic and hypoxic changes in the brain due to impaired blood supply to the brain, thus causing cerebral ischemia. Patients can experience a variety of different signs and symptoms, mainly depending on the blood vessels involved in the lesion. In the case of insufficient blood supply to the internal carotid artery system, the patient usually presents with darkness before the eyes, and may also experience sensory disturbances in the limbs, motor dysfunction, and may also experience speech dysfunction. In case of insufficient blood supply to the vertebral basilar artery system, patients usually present with dizziness, balance disorders and ataxia. Cerebral blood supply insufficiency, usually occurs in middle-aged and elderly people, most patients have a history of cerebral atherosclerosis, hyperlipidemia, diabetes mellitus and hypertension. In cerebral arterial atherosclerosis, the lumen of the tubes is narrowed, the walls of the tubes are stiff, and the blood vessels have poor elasticity, which may cause cerebral blood supply insufficiency in certain stressful situations. If the patient has high blood lipids and diabetes, which increase blood viscosity and slow blood flow, it is also easy to cause cerebral blood supply insufficiency. When there is cerebral blood supply insufficiency, drugs that improve cerebral metabolism, as well as improve blood circulation, can be taken orally. For drugs to improve blood circulation, Cipro and Ginkgo biloba drops can be applied; for drugs to improve cerebral metabolism, Olracetam and Piracetam are usually applied. If the patient’s age is >50 years old, oral aspirin anti-platelet aggregation treatment is also available. At the same time to control the patient’s lipids, blood sugar and blood pressure and so on.