咳嗽之癥．必因感冒而成．蓋皮毛者．肺之合也．先皮毛受邪氣．邪氣得從其合．則傷于肺．故令嗽也．乍暖脫衣．暴熱遇風．汗出未干．遽爾戲水．致令傷風咳嗽．初得時面赤唇紅．氣粗發(fā)熱．此是傷風．痰壅作嗽．嗽久．津液枯耗．肺經(jīng)虛矣．肺為諸臟華蓋．臥則開．坐則合．坐則稍寬．臥則氣促．乃因攻肺下痰之過．名曰虛嗽．又當補脾土．而益肺氣．運土入水．借土氣以生金．則咳自愈．