Why ear infections recur
Allergic skin disease is a major underlying cause of recurrent otitis in dogs. Ear shape, moisture, endocrine disease, narrowed canals, and chronic inflammation can contribute. Yeast and bacteria are often secondary problems rather than the original trigger.
How the ear is evaluated
A veterinarian may inspect the canal and eardrum with an otoscope and examine ear debris under the microscope. Cytology helps determine whether yeast, cocci, rods, or inflammatory cells are present.
When is it urgent?
Severe pain, a swollen ear flap, head tilt, loss of balance, neurologic signs, or rapidly worsening swelling needs prompt care. A grass awn or other foreign body is particularly important when signs start suddenly in one ear.
Cleaning at home
Use only a veterinary-recommended ear cleaner and technique. Cotton swabs pushed deep into the canal can pack debris farther in. Alcohol or peroxide may sting inflamed tissue and is not a universal treatment.