“Vocal cord dysfunction is the abnormal closing of the vocal cords when you breathe in or out. It’s also called laryngeal dysfunction, paradoxical vocal cord movement disorder or paradoxical vocal fold motion. Like asthma, vocal cord dysfunction can be triggered by breathing in lung irritants, having an upper respiratory infection or exercising. However, unlike asthma, vocal cord dysfunction isn’t an immune system reaction and doesn’t involve the lower airways.”

MAYO CLINIC