Infarct foci means that after the cerebrovascular blood flow is suddenly interrupted, resulting in local necrosis of brain tissue, this part is called cerebral infarct foci, the formation of the causes of atherosclerosis, hypertension, long-term poor glycemic control, high-fat hyperlipidemic and hyperviscosity have a certain relationship, and cardiac thrombus dislodgement leading to cerebral vascular blockage caused by the so in the clinic must be actively targeting the risk factors for prevention. For example, if the patient has atrial fibrillation, the patient should be given oral anticoagulation therapy with warfarin to prevent the occurrence of cerebral infarction caused by cardiogenic embolus dislodgement. If there is cerebral atherosclerosis or cerebral thrombosis, patients should usually take oral aspirin or clopidogrel to prevent cerebral infarction by anti-platelet aggregation. If there are unstable and inhomogeneous plaques in the neck blood vessels, oral atorvastatin calcium tablets and resuvastatin calcium tablets should be taken to lower lipids and stabilize plaques, and protect the endothelial therapy.