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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.
Reflux can cause or exasperate coughing in two ways: In some cases, the acid flowing backward in the esophagus stimulates a reflex, causing a person to persistently cough or clear his or her throat. This happens most often when lying down, after a large meal, or after intense exercise.