Ear infections are among the most common reasons dogs see a vet, and among the most frustrating, because they so often return.
The reason they return is that the infection is usually a consequence rather than a cause.
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Why dogs get them in the first place
A dog’s ear canal is shaped like an L — it runs down, then turns inwards towards the eardrum. That shape traps moisture, wax and debris in a warm, dark, poorly ventilated space.
Add anything that disturbs the skin lining that canal and bacteria or yeast, which live there normally, overgrow.
Predisposing factors make the environment worse: floppy ears, hairy canals, narrow canals, swimming, humid weather.
Primary causes actually start the problem:
- Allergies — atopic dermatitis and food allergy together account for the large majority of recurrent ear infections. In many dogs the ear is the first and sometimes the only place allergy shows
- Ear mites — common in puppies, less so in adults
- Foreign bodies — grass seeds are the classic, and they cause sudden, dramatic, one-sided pain
- Endocrine disease — hypothyroidism, Cushing’s
- Polyps or masses
That distinction is the point of this article. If your dog has had three ear infections in a year, the question is not “which drops this time” but “what is driving this”.
The signs
- Head shaking or tilting
- Scratching at the ear, or rubbing the head along furniture and carpet
- Odour — often yeasty and sweet, or foul
- Redness, swelling or heat in the ear flap and canal
- Discharge: brown, yellow, black, or waxy
- Pain when the ear or the area below it is touched
- Reluctance to have the head handled
- In severe or chronic cases: a narrowed canal, hearing loss, or a head tilt with balance problems if the middle ear is involved
Why you should not just buy drops
Treatment depends entirely on what is growing, and on whether the eardrum is intact.
A vet will look down the canal with an otoscope and usually examine a swab under the microscope. That takes minutes and it determines everything: yeast, bacteria (rods versus cocci), mites, or inflammation with no infection all get different treatment.
Chronic or resistant infections may need culture and sensitivity testing, and sometimes a deep flush under general anaesthetic.
Cleaning: how, and how often
For a healthy dog with no history of ear problems, routine cleaning is usually unnecessary and can do harm. Over-cleaning irritates the canal lining.
Clean when there is visible wax or debris, after swimming, or as directed after an infection.
Method:
- Use a proper veterinary ear cleaner. Not water, not vinegar, not hydrogen peroxide, not alcohol
- Fill the canal generously — being timid with the amount is the commonest mistake
- Massage the base of the ear for twenty to thirty seconds. You should hear a squelch
- Let your dog shake. Stand back
- Wipe the visible parts of the ear flap and the opening with cotton wool or a soft pad
- Never push a cotton bud down the canal. It packs debris against the eardrum
If cleaning hurts, stop and see a vet. A painful ear usually means an inflamed one.
Earth Rated Dog Wipes
Useful for wiping the outer ear flap and folds after cleaning, and for the general post-walk tidy-up. Wipes are for the visible outer ear only — the canal itself needs a liquid cleaner.
The allergy connection
If your dog has recurring ear infections, look for the pattern:
- Both ears, recurring, with itchy feet, belly or face — this is allergic skin disease until proven otherwise
- Seasonal — pollen-driven atopy
- Year-round, sometimes with digestive signs — food allergy is more likely, and an eight-week elimination diet trial is the only reliable way to test it
- One ear, sudden, very painful — think foreign body, and go today
Treating the ear and ignoring the allergy is a cycle that can run for years. Modern allergy treatment has improved enormously, and controlling the underlying disease often ends the ear problem entirely.
Prevention
- Dry the ears after swimming and bathing. A dry cotton pad at the canal opening, not a bud
- Keep excess hair trimmed around the opening in breeds that grow it. Plucking hair from inside the canal is now controversial — it can cause inflammation, so ask your vet what suits your dog
- Manage allergies properly, with veterinary support
- Check the ears weekly. Lift the flap, look, and smell. Thirty seconds
- Do not over-clean a healthy ear
- Finish the full course of any prescribed medication. Stopping when the ear looks better is a leading cause of resistant infections
When it becomes surgical
Repeated untreated infections cause permanent thickening and narrowing of the canal. In the worst cases the canal calcifies and closes, and the only remaining option is total ear canal ablation — a major surgery that removes the canal entirely.
Dogs cope well with it, and owners frequently say their dog’s temperament improved afterwards because years of pain had ended. But it is the endpoint of a road that usually started with a treatable allergy, and that is the argument for taking the third ear infection seriously rather than the tenth.
