Swimmer’s ear is an infection in the external ear canal. Although it is more common during the swimming season, it can occur at any time of year and is not necessarily related to swimming. Excessive moisture in the ear canal can lead to an over growth of fungus and bacteria. Besides the buildup of moisture in the ear canal, otitis externa is frequently caused by trauma to the ear canal from self-cleaning and irrigations. The condition is easily treated with either acidifying ear drops or antibiotic ear drops. However, in order for the drops to be effective, the ear canal should be meticulously debrided of any wax and fungal matter. Oral antibiotics are rarely needed unless the infection has spread beyond the ear canal.