Swimmers ear is usually a result of using objects such as cotton swabs in the ear canal which cause irritation and remove the protective wax.
Infection can then develop following prolonged retention of water from swimming or bathing.
There is a possibility of low grade fevers, enlargement of lymph nodes, and pain and swelling of the ear canal. Usually the middle ear and ear drum are not involved. Take the prescribed medication exactly as instructed. If you are uncertain about any aspect of your antibiotic treatment ask for further explanation. Take aspirin, ibuprofen or acetaminophen every 4-6 hours for fever and discomfort.