What is swimmer's ear? What causes it?

AUSTIN (KXAN) -- With plenty of people turning to swimming pools and local waterways for reprieve this summer, some might unfortunately find themselves dealing with swimmer's ear. But what, exactly, is it, and what causes it?Mayo Clinic defines swimmer's ear as an infection in the outer ear canal, often caused by water that lingers in your ear and leads to bacteria growth. Symptoms traditionally start off mild before worsening if the infection is left untreated.Santa Fe Animal Shelter hopes to g