时至冬日,天寒地冻,外出戴一顶帽子是很有必要的。因为天寒致病“首”当其冲,寒冷可使血管收缩、血压升高,毛细血管也可能发生硬化,甚至造成小动脉持续痉挛,所以冬天脑出血(俗称中风)发病率明显增高。临床上还证明,冬天戴帽子的人群中感冒及呼吸道疾病的发病率比不戴帽子的人群低50%。 It is necessary to go out to wear a hat when it is cold in winter. Because of genital disease “the first ” when its impact, the cold can vasoconstriction, blood pressure, capillaries may also be hardened, and even cause persistent spasm of small arteries, so the incidence of cerebral hemorrhage in winter (commonly known as stroke) was significantly higher . Clinically, it has also been proven that the prevalence of cold and respiratory diseases in people wearing hats in winter is 50% lower than in those who do not wear hats.