Laryngeal obstruction is clinically known as laryngeal obstruction, which is caused by obstruction of the laryngeal passage due to lesions in the larynx or surrounding tissues. The common causes include inflammation, such as pediatric acute laryngitis, acute epiglottitis, laryngeal abscess, retropharyngeal abscess, etc. These inflammations can narrow the laryngeal cavity and cause laryngeal obstruction. Trauma to the larynx can also cause, such as contusion of the larynx, high-pressure steam fumigation can lead to congestion and swelling of the mucosa of the larynx. Foreign bodies in the larynx can lead to mechanical obstruction, and can also cause laryngospasm to aggravate laryngeal obstruction. Laryngeal edema, especially laryngeal neurovascular edema, can instantly cause laryngeal obstruction, which needs to be treated in time, otherwise it can easily cause asphyxia. Tumors in the larynx, such as laryngeal cancer and multiple laryngeal papillomas, can directly block the vocal chambers and cause breathing difficulties.