Updated on November 7, 2024 Epiglottis Epiglottitis is an acute inflammation (commonly infectious) of the supraglottic region involving the epiglottis, vallecula, arytenoids, and aryepiglottic folds. It may also be referred to as supraglottitis as it may affect supraglottic structures mostly. The most common cause is infectious – bacterial. Viral agents do not cause epiglottitis but...