general information compiled from published veterinary guidance. This is not veterinary advice and cannot diagnose your animal. Sponsored links earn a commission at no extra cost to you.
Dog ear infection signs — and the mistakes that make them worse
Ear infections are one of the most common reasons dogs see a vet. They are also one of the most commonly mistreated at home.
How this was built: general information compiled from published veterinary guidance. This is not veterinary advice and cannot diagnose your animal. Sponsored links earn a commission at no extra cost to you.
The signs
- Head shaking or tilting
- Scratching at one or both ears, sometimes until raw
- Redness, swelling or a bad smell from the ear
- Yellow, brown or black discharge
- Whining when the ear is touched
- Rubbing the head along furniture or the floor
- In severe cases: loss of balance, circling, or a head tilt that persists
Same-day vet if: there is a persistent head tilt, loss of balance, facial drooping, or the dog is in obvious pain. These suggest a middle or inner ear problem or a neurological issue, not a simple outer-ear infection.
Why they keep coming back
An ear infection is usually a symptom, not a standalone disease. Recurring infections are commonly driven by:
- Underlying allergy — the most common cause of chronic ear trouble in dogs.
- Anatomy — floppy ears trap moisture and reduce airflow.
- Swimming or bathing without drying the ear canal afterwards.
- Incomplete treatment — stopping drops when it looks better, before the course ends.
- Wrong treatment — yeast and bacteria need different drugs. Guessing fails.
What not to do
No cotton buds down the canal. You push debris deeper and risk damaging the eardrum.
No leftover drops from a previous infection. The eardrum may be ruptured, and some drops are toxic to the inner ear if they cross it.
No hydrogen peroxide or vinegar home remedies. They irritate already-inflamed tissue.
What actually helps
- Get a diagnosis — vets examine the canal and usually take a swab to identify bacteria versus yeast.
- Complete the full course, even after it looks normal.
- Dry ears after every swim or bath, using a vet-approved cleaner on a cotton pad — not a bud.
- Treat the underlying allergy if infections recur more than twice a year.
Questions people ask
What are the first signs of a dog ear infection?
Head shaking, scratching at the ear, redness, bad smell and discharge. A persistent head tilt or loss of balance needs a vet the same day.
Why do my dog's ear infections keep coming back?
Usually an underlying allergy, ear anatomy that traps moisture, or treatment stopped too early. Recurring infections need the cause investigated.
Can I treat my dog's ear infection at home?
Not safely. Yeast and bacterial infections need different drugs, and some drops are harmful if the eardrum is ruptured. Get a diagnosis.
Should I clean my dog's ears?
Yes, with a vet-approved cleaner on a cotton pad — never a cotton bud down the canal. Dry thoroughly after swimming or bathing.