The cause of parotid gland swelling in children is often elusive when a mumps viral infection has been excluded. We treated a child with parotid gland swelling secondary to autoinsufflation of the ductal system, a condition previously unreported in the English literature to the best of our knowledge. Although a congenital abnormality of the parotid duct may have been present, psychogenic factors played a major role in the cause of the patient's pneumoparotiditis.