what causes laryngospasm
Your vocal cords are located in an upper part of the airway called the voice box (larynx). A vocal cord spasm limits the flow of air through the larynx. The cause of laryngospasm is often not known, but certain conditions may be contributing factors or triggers: Gastroesophageal reflux disease (GERD), a condition in which acid from the stomach backs up into the food pipe (esophagus)