What condition is described as inflammation of the outer ear canal?

Otitis externa is the correct answer because it specifically refers to the inflammation of the ear canal, which is the outer part of the ear. This condition is often caused by infection, irritation, or allergic reactions, and is sometimes colloquially referred to as "swimmer's ear." Symptoms typically include pain, itching, and discharge from the ear canal, which can be exacerbated by water exposure or trauma to the ear. It is distinct from otitis media, which involves inflammation in the middle ear, and from sinusitis or pharyngitis, which relate to inflammation of the sinuses and throat, respectively. Understanding the specific areas affected is crucial for accurate diagnosis and treatment.