Otitis is a general term for inflammation or infection of the ear, in both humans and other animals.
It is subdivided into the following:Otitis externa, external otitis, or "swimmer's ear", involves the outer ear and ear canal. In external otitis, the ear hurts when touched or pulled. Otitis media, or middle ear infection, involves the middle ear. In otitis media, the ear is infected or clogged with fluid behind the ear drum, in the normally air-filled middle-ear space. This the most common infection and very common in babies below 6 months sometimes requires a surgical procedure called myringotomy and tube insertion. Otitis interna, or labyrinthitis, involves the inner ear. The inner ear includes sensory organs for balance and hearing. When the inner ear is inflamed, vertigo is a common symptom.