EarDoc Pressure Relief Earache Pain Ear Infection Instrument by EarDoc. $49.00. Safe, effective, non-invasive device. Vibrates the outer ear to reduce pain. Naturally opens the eustachian tube and dries the trapped fluids that cause ear infection, swimmers ear and other ear pain causes.EarDoc is a simple treatment for ear infection, middle-ear fluid, hearing loss, ear pain caused by air travel, and ear fullness caused by colds. For all ages!