The invention is directed toward a method of reducing motion sickness comprising the steps of introducing cooled gas into a users ear canal to reduce the temperature of the users tympanic membrane and vestibular system. The gas is circulated in the users inner ear, and then exhausted to the atmosphere. The cooled gas induces nystagmus in the user, promotes vestibular desensitization and resistance to motion sickness. The apparatus contemplated for the prevention of motion sickness has an earpiece having a conduit that dispenses cooled gas into the users ear canal. Gas is provided by a gas source connected to the earpiece with flexible tubing.
