Jan 26, - Symptoms of an inner ear infection may include: Dizziness or spinning sensation (vertigo) Nausea and vomiting. Problems with balance or walking. Hearing loss (or decrease in sound volume) in one ear. Earache or ear pain. Fever (sometimes) Feeling of fullness in the ear.Inner ear infection (in adults · What are the signs and · How long does an ear. This kind of ear infection can happen after any condition that keeps fluid from draining from the Common symptoms of a middle ear infection in adults are.