Laryngeal obstruction is a condition in which the laryngeal airway is narrowed by a lesion in the larynx or adjacent organs, resulting in difficulty in breathing. It is not an independent disease, but a group of syndromes. Laryngeal obstruction can cause hypoxia, which can lead to asphyxia and endanger the patient’s life if not treated in time. Due to the different acute and slow onset, there are two types of laryngeal obstruction: acute and chronic. Laryngospasm refers to the reflex spastic contraction of the laryngeal muscles, which causes the vocal cords to retract and the vocal chambers to partially or completely close, resulting in varying degrees of respiratory distress or even complete airway obstruction. 2, laryngeal itch cough The laryngeal itch cough is characterized by a strange itch in the larynx, and the more itchy it is, the more coughing it is, with the coughing point above the vocal cords and no lesion in the lungs on chest X-ray. 3.Laryngeal muscle weakness Vocal fold closure insufficiency is a disease of vocalization in which the laryngeal muscle weakness causes insufficient movement of the vocal folds, and also laryngeal muscle weakness and vocal fatigue. 4, phlegm in the larynx Phlegm in the larynx is the clinical manifestation of chronic pharyngitis. The main symptoms of chronic laryngitis patients are hoarseness, dryness of the larynx, laryngeal pain when speaking, often due to increased secretions in the larynx and feel that there is phlegm adherence. 5, laryngeal stabbing pain laryngeal stabbing pain is a symptom of foreign body obstruction, common foreign bodies are fish spikes, chicken bones. Laryngeal tingling may also be a local manifestation of chronic laryngitis. 6, laryngeal enlargement laryngeal enlargement is one of the symptoms of boys’ voice change period, voice change period: voice change period refers to the period of 14 DD16 years old adolescents, because of the growth of the larynx, vocal cords and the accompanying hoarseness, narrow range, articulation fatigue, local congestion and edema, increased secretions and thus lead to speech, singing voice is different from that of children and last for six months to a year.