Treatment for otitis externa

The present invention presents devices, kits, systems and methods that can be used to otitis externa. For example, a method of present invention includes applying a photosensitizing composition to treatment site within ear cavity where microbes causing otitis externa are located; inserting at least a portion of a light delivery device into the cavity; and applying light to the treatment site at a wavelength absorbed by the photosensitizing composition so as to inhibit or eliminate the microbes and/or to reduce inflammation at the treatment site but without causing physiological damage to host tissue within the ear cavity; wherein the light is delivered by the light delivery device to the treatment site and the light delivery device is in light communication with a light source via a waveguide.