Dear Mr. Kane,
This certainly sounds like a medical condition, not a psychological phenomenon. After your pediatricia investigates the possibility of, for example, ear and/or sinus infection or some obstruction in the ear, if all appears negative he will likely schedule a consult with an ENT specialist.
Tinnitus, or the sensation of sound in the ear when there is no sound, can be a sign of an ear disorder, but not necessarily. Tinnitus can be caused by something as simple as buildup of ear wax. It is sometimes, but not always, associated with hearing loss.
Hope all goes well on your visit.
Dee