Causes
Almost always secondary: allergies (the most common cause of recurrent otitis), mites, trapped moisture (dogs that swim, floppy ears), foreign bodies (grass awns), excess hair in the canal.
Diagnosis
Examination with an otoscope plus cytology of the discharge (identifies bacteria, yeast or mites). It is important to find the underlying CAUSE.
Treatment
Ear cleaning plus specific topical treatment according to the agent (antibiotic, antifungal, antiparasitic). KEY: treat the underlying cause or the otitis recurs again and again.
Prevention
Dry the ears well after bathing or swimming, check them after country walks (grass awns), treat underlying allergies, and do not use cotton buds deep in the canal.

