The causes of laryngeal obstruction include acute inflammatory diseases of the pharynx, laryngeal tumors, neck trauma, laryngeal edema, bilateral incomplete paralysis of the vocal cords, etc., as follows: first, acute inflammatory diseases of the pharynx: common ones include acute edematous laryngitis, acute epiglottitis, which can lead to blockage of the pharynx, and in severe cases, the risk of respiratory distress and asphyxia can occur, and pediatric acute laryngitis is also The second is laryngeal tumor: the common ones are advanced laryngeal cancer and advanced hypopharyngeal cancer, which can block the airway of the throat and lead to laryngeal obstruction; the third is neck trauma: the common ones are open neck trauma, which can lead to laryngeal obstruction; the fourth is laryngeal edema: patients have laryngeal edema caused by drug allergy, which can quickly lead to laryngeal The fifth type is incomplete paralysis of bilateral vocal folds: it can lead to inspiratory difficulties and is clinically associated with hoarseness and other related symptoms.