Due to the stimulation of cold air, it often leads to abnormal sympathetic excitation, spasmodic contraction of capillaries throughout the body, increased peripheral resistance of blood circulation, increased load on the left ventricle and the brain, causing an increase in blood pressure. At this time, platelets are also easy to agglutinate and form blood clots. It also leads to endocrine system dysregulation, increased secretion of chemical mediators such as catecholamines, increased blood viscosity, and shortened clotting time, further contributing to the increase in blood pressure and the formation of thrombus. Therefore, autumn and winter seasons are very likely to cause stroke. Common misconceptions of stroke patients Stroke is not an “old age disease”, and it is not uncommon to see patients in their 40s and 50s or even in their 20s and 30s. On the other hand, does not high blood pressure cause stroke? Although high blood pressure is the primary risk factor for stroke, if the lumen of the cerebral vessels becomes narrow, or if there are other risk factors for stroke, such as hyperlipidemia or diabetes mellitus, blood pressure can also cause stroke if it is not high. Why are strokes likely to occur in the fall and winter? Does regular infusion have a preventive effect? : 1. Low temperature can make the body surface expert reply to the elasticity of blood vessels to reduce, peripheral resistance increases, blood pressure increases, which in turn leads to cerebrovascular rupture and bleeding. 2, cold stimulation can also make sympathetic excitation, blood pressure increases, cerebrovascular ischemia. 3, cold can also increase the blood concentration, prompting the formation of emboli in the blood and the onset of disease. 4, the cold can make the respiratory resistance is reduced. The fall in temperature in autumn and winter causes vasoconstriction, which raises blood pressure and may be a trigger for stroke. It is a misconception to prevent stroke by regular infusion. Attention should be paid to control risk factors in general to prevent stroke effectively.