As late autumn draws to a close, it also means that winter is approaching. We all know that the incidence of stroke (whether it is ischemic stroke: cerebral infarction, cerebral embolism, transient ischemic attack or hemorrhagic stroke: cerebral hemorrhage, subarachnoid hemorrhage) is closely related to the change of seasons and climate, and it is generally believed that winter is the high incidence season of stroke. Why is this? In the cold winter, people coincidentally reduce the time and frequency of going outdoors, sweating is also reduced, energy consumption is also reduced, in order to resist the cold, people may consume more and higher calories, so that fat is unknowingly hoarded, followed by a quiet increase in weight. In addition, due to the big difference in temperature between day and night, indoor and outdoor, the diastolic function of blood vessels also undergoes rapid changes, for healthy people, the body will automatically adjust to this change, so that blood pressure and blood rheology and other changes tend to stabilize. However, for the elderly, this automatic adjustment function has been significantly reduced, coupled with pre-existing diseases such as hypertension, diabetes, hyperlipidemia, coronary heart disease arrhythmia, such as atrial fibrillation, etc., in the above circumstances may aggravate, and then easy to induce stroke.