咳嗽是临床上常见的一种症状,为肺脏疾患的主要症候之一。咳嗽之因,虽有种种,但可概之为二;一为外邪侵袭肺卫,肺卫不宣、清肃失职:二为内伤,其他脏腑病气相干于肺所致。肺为娇脏,只受得脏腑之清气,受不得脏腑之病气,病气于之,则咳而呛。所以不论外盛内伤只要影响肺经,皆能引起咳嗽。 Cough is a common clinical symptom and one of the main symptoms of lung disease. Although there are various causes of coughing, it can be summarized as two; one is the invasion of the lungs by exogenous evils, and the lungs fail to declare and clear their duties: the second is internal injuries, and the other is caused by gas-phase dryness in the lungs. The lungs are filthy, and they only suffer from the viscera and clear air. Therefore, regardless of internal injuries, as long as they affect the lungs, can cause cough.