Otitis externa is a condition that causes inflammation (redness and swelling) of the external ear canal, which is the tube between the entrance to the ear canal and eardrum.
With treatment, these symptoms should clear up within a few days. However, some cases can persist for several months or longer.
Most cases of otitis externa are caused by a bacterial infection, although the condition can also be caused by:
There are a number of things that can make you more likely to develop otitis externa, including: