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Coughing is a response to a blockage in either the throat, trachea, or lungs, which is blocking proper airflow (i.e. preventing you from breathing sufficiently).

Coughing is an attempt by the body to expel whatever is causing such a blockage. It is a fairly straight-forward mechanical action - the diaphragm contracts quickly, and uses the created air pressure to "push" against whatever the blockage is. Repeated coughs are used against difficult-to-expel things, such as mucus in the lungs.

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14y ago

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