Vocal edema refers to edema, erosion and submucosal hemorrhage of the vocal mucosa. It is mostly caused by external factors. The common symptom is that the infant is born with a loud breathing sound but a normal cry. The degree of dyspnea then depends on the obstruction. Improperly performed anesthesia for fiberoptic endoscopy tracheal intubation or inhalation injury. Injury above the vocal cords is a clinical manifestation of open neck injury. So how should vocal fold edema be examined? Fiberoptic bronchoscopy Fiberoptic bronchoscopy can directly observe the degree of damage to the pharynx, vocal cords, trachea and bronchial mucosa and determine the site of injury. Because it can take, drain and wash in the airway, it is another treatment tool. Dynamic observation through fiberoptic bronchoscopy allows to understand the regression of the evolution of the lesion. CT examination of the larynx CT examination of the larynx is a method of examination of the larynx by CT. CT is the preferred method of examination for laryngeal injury and can identify hematoma and edema, and also observe injury after radiotherapy – necrosis, fibrosis and atrophy, luminal narrowing. Laryngoscopy (indirect laryngoscopy, direct laryngoscopy, fiberoptic laryngoscopy, electronic laryngoscopy, stroboscopy, etc.): diagnosis can be made by various laryngoscopic examinations combined with clinical symptoms. If indirect laryngoscopy is unsatisfactory, direct laryngoscopy, fiberoptic laryngoscopy, electronic laryngoscopy, stroboscopy, etc. can be performed, including stroboscopic laryngoscopy to observe both vocal fold morphology and vocal fold movement. In addition, various types of voice acoustic assessment and aerodynamic assessment can be performed to understand the extent to which the vocal folds and the airflow through the vocal folds are affected by the lesion during vocalization.