What is otitis externa?

Otitis externa refers specifically to an infection or inflammation of the ear canal, which is part of the outer ear. This condition is often caused by water remaining in the ear, allowing bacteria or fungi to grow, leading to symptoms such as itching, redness, swelling, and sometimes discharge. It's commonly known as "swimmer's ear" due to its frequent occurrence in individuals who participate in water activities like swimming, where water can get trapped in the ear canal.

Understanding the structure of the ear can help clarify why otitis externa is categorized this way. The ear is divided into three main parts: the outer ear, middle ear, and inner ear. Otitis externa specifically targets the canal that leads to the eardrum, distinguishing it from infections of the middle ear (otitis media) or other areas.

In contrast, the other choices refer to entirely different body parts or systems. For example, an infection in the throat would involve the respiratory system, while conditions affecting the lungs pertain to pulmonary issues, and an eye infection would relate to the ocular area. Thus, the clear identification of otitis externa as involving the ear canal underscores the importance of recognizing accurate medical terminology and conditions.