感冒、气管炎,支气管炎是呼吸道常见疾病。咳、痰、喘为其主要症状。痰是喉以下呼吸道分泌的黏液、脓液及它们的混合物,痰形成后就会堵塞气道、肺泡而引起通气障碍,人就会感到呼吸困难,喘憋,甚至发生青紫,这时用咳嗽来排痰非常重要。因为咳嗽是机体的一种保护性反射,通过此动作可将痰液清除, Cold, bronchitis, bronchitis is a common respiratory disease. Cough, sputum, asthma as its main symptoms. Sputum is the secretion of throat following the mucus mucus, pus and their mixture, the formation of sputum will block the airway, alveolar and cause ventilation problems, people will feel breathing difficulties, wheezing, or even bruising, then use the cough Exhaustion is very important. Because the cough is a protective reflex of the body, this action can be cleared of sputum,