Swimmer's Ear (aka Otitis is an infection from either fungus or bacteria in the ear. It is caused by moisture in the ear.
The symptoms are itching and pain in the ear, and sometimes redness in the ear canal
To treat it, do the following
PREVENTION: To avoid Swimmer's Ear, drain out the water after swimming, bathing, and showering.
If your Swimmer's Ear doesn't go away after following these steps, see a doctor.