Swimmer's ear is the colloquial name for acute otitis externa, an infection of the outer ear. Though the nickname implies that you get the infection from swimming, you can contract swimmer's ear ...

hydrogen peroxide can cause residual bubbling inside the ear canal, making it difficult for doctors to examine the inner ear. Hydrogen peroxide can cause skin irritation and blistering.

Itchiness of the outer ear and the presence of discharge and drainage are also common symptoms. To treat swimmer's ear, doctors will often prescribe antibiotics in the form of a "topical treatment ...