Swimmer's ear is also known as otitis externa, an infection of the ear canal by the bacteria that like to live in swimming pools. The quick answer to your question is this. Patients with swimmers ear typically begin getting relief within 48 hours. However, some patients require up to 2 weeks of therapy with antibiotic eardrops. If after this 2 week period you daughter is still having symptoms, you should be seen by a physician right away for work up of treatment failure. Thus if it has been less than 2 weeks, continue with the drops, but be prepared to schedule another appointment with your daughter's pediatrician
or ENT doc soon if she doesn't get better. If your daughter fails the topical eardrops, other treatments are available. Your physician may choose a different type of antibiotic, may add
an oral antibiotic, and may choose to add a topical steroid for symptom relief. Also, some physicians find that cleaning the ear with hydrogen peroxide in the office may hasten recover. This is something that should not be tried at home. Keep in mind that most cases of otitis externa clear without issue, but some can progress to damaging infections. Therefore, it is pertinent to stay on top of the infection until it is cleared. Good luck.