Acute laryngitis in children is an acute inflammation of the laryngeal mucosa, which can be caused by viral or bacterial infection, and is often secondary to upper respiratory tract infection. It can also be a precursor or complication of certain acute infectious diseases. It is mainly characterized by hoarseness and a barking cough. In severe cases, it can lead to life-threatening laryngeal obstruction. Chinese medicine calls it "laryngeal wind, laryngeal sound, and laryngeal paralysis". It is more common in children under 5 years old. Children have low resistance, and due to the anatomical characteristics of the larynx of children, the laryngeal cavity is narrow, the laryngeal cartilage is soft, the submucosal tissue of the epiglottic cartilage, arytenoid cartilage, aryepiglottic folds, ventricular bands and subglottic area is loose, and the mucosal lymphatic vessels are rich. Edema is prone to occur after inflammation, causing airway obstruction. Children's coughing function is not strong, and it is not easy to expel the secretions of the larynx and lower respiratory tract, which makes breathing more difficult. Therefore, the condition of acute laryngitis in children is often more serious than that of adults. If it is not diagnosed and treated in time, it can be life-threatening.