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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.
Most respirologists say coughing is a good thing. âItâs a natural reflex to clear noxious irritants and secretions, such as mucus (or phlegm), from the airways,â says Dr. Andreas Freitag, an associate professor of medicine and pediatrics at McMaster University.