咳嗽是呼吸系统疾病中最常见的症状之一,其有声为咳,有痰为嗽,既有声又有痰者称为咳嗽。干咳常见于急性咽喉炎、支气管炎的初期;急性骤然发生的咳嗽,多见于支气管内异物;长期慢性咳嗽,多见于慢性支气管炎、肺结核等。咳嗽是一种保护性反射动作,能把呼吸道过多的分泌物或异物随着气流排出 Cough is one of the most common symptoms of respiratory diseases, its sound is cough, phlegm for cough, both sound and sputum called cough. Dry cough common in acute pharyngitis, bronchitis in the early; acute and sudden cough, more common in bronchial foreign body; long-term chronic cough, more common in chronic bronchitis, tuberculosis and so on. Cough is a protective reflex action, can discharge too much airway secretions or foreign objects with the air flow