a condition in which the passage of the outer ear (= the part of the ear that can be seen on the side of the head) becomes swollen and painful

Otitis externa is common among swimmers and scuba divers. 外耳炎在游泳者和潜水者中很常见。

Probably the most common of the ear complaints in adults is otitis externa. 在成年人的耳部症状中，最常见的可能是外耳炎。