At present, every autumn and winter, there are many elderly people lining up for infusion in hospitals, and many patients with cerebral infarction even ask for regular infusion, thinking that this can reduce blood viscosity and prevent stroke recurrence, and many primary care doctors also acquiesce to this view. In fact, this concept is wrong. There is no evidence-based medical evidence for this practice, and there is no evidence that infusions prevent strokes from occurring. If there are no stroke symptoms, a simple intravenous infusion will not help the patient, but may be harmful. Because infusion is a large amount of fluid in a short period of time, it increases the preload on the heart and may also cause adverse reactions such as infusion reactions. The key to stroke prevention is to change bad habits such as smoking, alcoholism, obesity, physical inactivity, high salt, high sugar, high fat diet, etc.; actively treat risk factors for cerebral infarction such as hypertension, diabetes, hyperlipidemia, atrial fibrillation, atherosclerosis, etc.; actively antithrombotic treatment such as long-term use of antiplatelet drugs such as aspirin; regularly perform necessary physical examinations including: blood system examination, cardiac ultrasound, cervical vascular ultrasound, transcranial Doppler ultrasound, cranial CT, magnetic resonance or magnetic resonance angiography, etc. If carotid artery stenosis is found, interventional treatment after angiography will be performed if necessary.