Vocal cord dysfunction (VCD) is a disorder that occurs when the vocal cords move toward each other when a person breathes, narrowing the airway and causing wheezing and difficulty breathing.
VCD is also called paradoxical vocal cord motion (PVCM).
VCD is often misdiagnosed as either asthma or exercise-induced bronchospasm.
As a result, many individuals with VCD are treated with inhalers and steroids for asthma, which do not help control VCD and which have potentially harmful side effects.
The number of people with VCD in the general U.S. population is unknown.