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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)
For removal of a foreign body via the Heimlich maneuver, see Clearing and Opening the Upper Airway. Most laryngeal disorders cause dysphonia, which is impairment of the voice (see The Professional Voice). A persistent change in the voice (eg, > 3 wk) requires visualization of the vocal cords, including their mobility.