咳嗽是当什么东西刺激咽喉或气道时身体做出反应的方式。刺激物刺激向脑发送消息的神经。然后，脑告诉胸部和腹部的肌肉从肺部排出空气，以挤出刺激物。
偶尔咳嗽为正常且健康。持续咳嗽数周或咳出变色或带血的黏液可能意味着某种需要医疗护理的状况。
有时侯，咳嗽可能非常用力。长时间剧烈的咳嗽可能刺激肺部，并引起更多咳嗽。它也令人筋疲力尽，可能导致失眠、头晕或昏厥、头痛、尿失禁、呕吐、甚至肋骨骨折。
June 13, 2020
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