冬季里天气寒冷,气候干燥,加上家家户户生火炉取暖,室内外烟尘飞扬,空气受到污染。由于人们的呼吸道粘膜直接受到外界寒冷、干燥和污浊空气的刺激,使粘膜血管收缩,造成供血不好和营养障碍,致使呼吸道粘膜抵抗力减弱,容易被病毒、细菌等微生物侵袭而引起发炎、肿胀、分泌痰液,被刺 Cold weather in winter, the climate is dry, with every household fire stove heating, indoor and outdoor dust flying, air pollution. As people’s respiratory mucosa directly by the outside world cold, dry and polluting air stimulation, mucosal vasoconstriction, resulting in poor blood supply and nutritional disorders, resulting in decreased respiratory mucosal resistance, easily infected by viruses, bacteria and other microorganisms caused by inflammation and swelling , Secretion of sputum, was stabbed