A method for external ear canal pressure regulation to alleviate one or more symptoms associated with a disorder or treat one or more disorders, the method including providing a fluid transfer device which generates a fluid flow of a fluid through an earplug, the earplug having an earplug external surface configured to sealably engage an external ear canal wall as a barrier between an external ear canal pressure and an ambient pressure； sealably engaging the earplug of the fluid transfer device with the external ear canal wall as the barrier between the external ear canal pressure and the ambient pressure； and operating the fluid transfer device to generate the fluid flow of the fluid through the earplug to achieve an external ear canal pressure differential between the external ear canal pressure and the ambient pressure effective to alleviate a disorder symptom or treat a disorder.
