Swimmer’s ear is an infection of the skin lining the ear canal. Bacteria can enter the skin of the ear canal and cause an infection through a scratch, injury from a foreign object, or if the ear is wet for a prolonged period of time. Swimmer’s ear is more common in pre-school and school-age children. Symptoms include itching and pain in the ear canal, which is often accompanied by a small amount of clear discharge.
Check out the info on the following webpage: http://www.nlm.nih.gov/medlineplus/ency/article/000622.htm