Multiple foci of cerebral ischemia, which may cause cerebral infarction in patients with severe cases. Patients may present with a variety of different signs and symptoms, depending mainly on the site of the infarct focus, and may present with limb sensory impairment, motor dysfunction, or dizziness, balance disorders, and ataxia. Speech dysfunction, including aphasia and dysarthria, may also occur, and some patients may also develop hemianopia or quadrant blindness. Most patients are caused by atherosclerosis, which occurs mostly in middle-aged and older adults over the age of 50, and patients may have diabetes and hyperlipidemia. Ultrasound of the neck blood vessels and, if necessary, CTA of the head and neck or cranial MRI with angiography should be checked to clarify the intracranial vascular condition or the vascular condition of the neck. Some drugs to improve cerebral metabolism or improve blood circulation can be applied. Drugs to improve cerebral metabolism are generally used to improve cerebral metabolism, such as olanzapine and piracetam. Drugs to improve blood circulation can be applied such as Shuxin, Vibrulun, and also Danshen and Panax notoginseng. If necessary, aspirin can also be applied to anti-platelet aggregation therapy, as well as to control the patient’s blood lipids, blood sugar, etc.