An ear infection is a common ailment that many people experience. There are several synonyms for ear infection, including otitis media, middle ear infection, and otitis interna. Otitis media is a Latin term for inflammation of the middle ear and is usually caused by a viral or bacterial infection. Middle ear infection is a more general term that refers to inflammation of the middle ear cavity. Otitis interna or inner ear infection is a more serious form of ear infection that affects the inner ear and can cause dizziness and balance problems. Regardless of the term used, ear infections can cause discomfort and should be treated promptly to avoid complications.