Otitis externa, commonly known as swimmer's ear, is an inflammation or infection of the outer ear canal. This condition can be caused by water exposure, injury, or irritants, leading to symptoms such as itching, redness, and discharge. It is most prevalent in individuals who frequently swim or have moisture in their ears. Treatment for otitis externa typically involves cleaning the ear canal and using antibiotic or antifungal ear drops to eliminate the infection. In some cases, pain relief medications may also be recommended. Maintaining ear hygiene and keeping ears dry can help prevent future occurrences.