Swimmer's ear
Otitis externa is a condition that causes inflammation (redness and swelling) of the external ear canal, which is the tube between the outer ear and eardrum.
Otitis externa can cause a number of different symptoms affecting the ear and the surrounding area.
There are several different causes of otitis externa, such as a bacterial infection, a middle ear infection or an allergic reaction.
Otitis externa can usually be treated effectively with ear drops prescribed by your GP and some simple self-care techniques.
Although complications associated with otitis externa are uncommon, there's a small risk of further problems developing.
It's not always possible to prevent otitis externa, but you can reduce your risk of developing the condition.