Inner ear infections, a.k.a. labyrinthitis, vestibular neuritis – Inner ear infections are most commonly due to a virus, and may be associated with other signs of an upper respiratory or sinus infection. Bacterial inner ear infections are rare but can occur, and usually spread from an untreated middle ear infection. Symptoms include dizziness, nausea, vomiting, hearing loss, tinnitus (ringing), and sometimes facial weakness attributed to Bell’s Palsy. Inner ear infections may resolve on their own, but you should seek medical attention to determine the underlying cause, especially if there is hearing loss. Sudden hearing loss associated with these symptoms needs urgent treatment that is best administered by an ENT.