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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)
9. Sleep-related laryngospasm Very rarely, some people have a spasm of the throat that closes off the airway and halts breathing during sleep. The result is similar to a single episode of apnea, but these patients do not have apnea. Typically, the patient will wake up choking and jump out of bed, clutching the throat.