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One such reflex is a cough. This is typically triggered when the larynx senses that something has penetrated this upper portion of the airway. The cough, then, acts as a protective mechanism, serving to cough out or expel something at risk for being inhaled. There are normal reflexive thresholds or âtriggersâ that exist in the larynx. When these thresholds are lowered (i.e., more sensitive), less stimulation is required to trigger a cough.
Night cough is a cough, or tussis, that occurs primarily at night, typically when you are lying down (postural cough). Physiologically, coughing is a rapid expulsion of air from the lungs that happens reflexively to keep the airways clear.