What causes recurring ear infections in dogs?
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Overview
Recurring ear infections in dogs often happen because there is an underlying trigger that keeps irritating the ear, rather than because the ear is simply dirty. Common causes include allergies, moisture, excess hair or wax, ear shape, and sometimes a foreign body or infection that has not fully settled. The good news is that owners can usually spot useful clues at home, which helps a vet work out what is going on.
Things To Check
1. Notice when the problem tends to flare up, such as after swimming, bathing, muddy walks or grooming.
2. Look for redness, swelling, discharge, an unpleasant smell, scabs or repeated head shaking.
3. Check whether your dog is scratching one ear more than the other, or reacting when the ear is touched.
4. See if your dog also has itchy skin, paw licking, face rubbing or seasonal symptoms, which can point towards allergy-related irritation.
5. Think about whether the ears stay damp, especially in dogs with floppy ears, a lot of fur in the ear canal, or a history of swimming.
6. If it is safe to do so, have a gentle look at the outer ear only for visible debris, grass seeds or obvious irritation. Avoid putting anything into the canal.
7. Make a note of how often the infections return and what seemed to happen before each episode.
Common Causes
Allergies are one of the most common reasons dogs keep getting ear infections. These can be environmental, such as pollen or dust, or linked to food sensitivity in some dogs.
Moisture in the ear can also lead to repeated problems, especially after swimming, washing or exercise in wet weather.
Some dogs are more prone to buildup of wax, narrow ear canals, heavy ear hair or floppy ears, all of which can make the ear harder to keep clean and dry.
Less commonly, a foreign body, mites, a hormonal issue, a polyp or a deeper ear problem may be involved. In some dogs, an earlier infection may not have fully resolved and keeps coming back.
What To Do
Keep a simple record of when the ear problems happen, what the ear looks and smells like, and whether anything seems to trigger a flare-up. This can be very helpful if you need veterinary advice later.
Try to keep the ears dry after bathing, swimming or getting wet, and follow any routine ear care your vet has previously recommended for your dog.
If your dog has ongoing skin itching or seasonal flare-ups as well as ear problems, mention this when you speak to a vet, because the ear issue may be part of a wider pattern.
Do not use cotton buds or put home remedies into the ear canal unless you have been told to do so by a vet.
When To Contact A Vet
If your dog keeps getting ear infections, it is worth booking a vet check, especially if the ear is painful, there is discharge or smell, or the problem keeps returning despite basic care. Recurrent ear infections usually need the underlying cause to be identified, not just the current flare-up managed.
Products That May Help
For dogs with recurring ear concerns, general grooming and hygiene support can be useful as part of a steady routine, especially when you are trying to keep track of what seems to trigger flare-ups.
Related Questions
Why does my dog keep getting ear infections after swimming?
Can allergies cause ear infections in dogs?
How can I tell if my dog’s ear needs a vet check?
Atlas is here to support owners with practical, easy-to-understand guidance. It is not a substitute for professional veterinary advice. If you're concerned about your animal's health, symptoms worsen, or something doesn't feel right, contact your vet.