Dog Ear Infection: Symptoms, Causes, and Treatment

The important point for you as an owner is that an ear infection is usually a symptom, not the whole story. According to the MSD Veterinary Manual, otitis is very often driven by an underlying cause such as allergies or trapped moisture, which is why infections come back if only the surface is treated. It is also why you cannot fix it reliably at home. Yeast, bacteria, and ear mites look similar from the outside but need different medicines, and telling them apart takes a vet and a look at a swab under a microscope.

Worried about your dog's ear? You can check the symptoms free in the Omelo app in about 30 seconds and see whether they point to a vet visit. In India, you can also book a video consultation with a licensed vet for ₹349 at vet.beomelo.com if you want a professional to look at what you are seeing before you travel to a clinic.

• Head shaking or tilting, often towards the sore ear.
• Scratching or pawing at the ear, or rubbing the ear along the floor and furniture.
• A foul, yeasty, or sweetish smell coming from the ear.
• Redness and swelling of the ear flap and the opening of the canal.
• Discharge that is brown, yellow, black, or waxy, sometimes with a greasy look.
• Pain or flinching when you touch or gently lift the ear.
• Warmth around the ear, and sometimes hair loss or scabbing from constant scratching.
• A dog that seems irritable, off its food, or reluctant to have its head touched.

One-sided signs are common, so compare the two ears. If your dog has been shaking its head hard for a while, you may also notice a soft, fluid-filled swelling of the ear flap. That is an aural haematoma, a burst blood vessel from the shaking, and it needs a vet.

• Allergies. This is the single most common underlying cause in dogs, whether to something in the diet or to things in the environment such as dust and pollen. Allergic skin is inflamed skin, and the ear canal is lined with skin, so recurrent ear infections are often the first sign of an allergy.
• Trapped moisture. Water left in the canal after a bath, a swim, or a rainy, humid day creates the warm, damp setting yeast and bacteria love. This is sometimes called swimmer's ear.
• Ear mites. Tiny parasites, more common in puppies, that cause intense itching and a dark, crumbly, coffee-ground discharge. Mites need a different treatment from yeast or bacteria, which is covered in our ear mites guide.
• Ear shape and hair. Floppy ears that cover the canal, and breeds with lots of hair inside the ear, trap heat and moisture. Labradors, Cocker Spaniels, Beagles, and Basset Hounds are examples that are prone.
• Foreign material. A grass seed, an awn, or debris lodged in the canal can start a painful, often sudden, one-sided infection.
• Other causes. Hormonal conditions such as hypothyroidism, and rarely growths or polyps in the canal, can also lead to ongoing ear problems.

A dog can have more than one of these at once. This is exactly why a vet looks past the immediate infection to the reason behind it.

• A persistent head tilt, loss of balance, or a dog stumbling or falling to one side.
• Walking in circles, or rapid flicking eye movements.
• Signs of severe pain, such as crying out when the head is touched or refusing to let you near the ear.
• Sudden deafness, or a face that looks droopy or uneven on one side.
• Bleeding from the ear, or a rapidly swelling ear flap.

These can point to otitis media or interna, a deeper infection that can affect balance and hearing, and it needs prompt veterinary care.

Breed choices matter too. Many popular family dogs in India, including Labradors, Cocker Spaniels, and Beagles, have floppy ears that seal in heat and moisture, and some have hairy canals that trap wax and debris. None of this means your dog is destined for ear trouble, but it does mean drying the ears and checking them regularly through the humid season is worth the small effort.

Treatment usually has two parts.

• Clearing the current infection. This means a thorough, gentle professional clean of the canal, followed by medicated ear drops chosen for what the cytology showed, often combining an antifungal, an antibiotic, and an anti-inflammatory. Severe or deep infections may also need oral medication.
• Managing the underlying cause. If allergies or chronic moisture are behind it, the vet will help you address that, because otherwise the infection simply returns.

Please do not treat an ear infection at home with leftover drops or human products. The MSD Veterinary Manual is clear that the right treatment depends on the exact cause and on whether the eardrum is intact, and the wrong choice can worsen the ear or damage hearing. Many dogs are much more comfortable within a few days of the correct treatment, but finish the full course and go back for the recheck your vet suggests, since an ear that looks better on the outside can still harbour infection deeper down.

• Use a vet-approved ear cleaner, not water, hydrogen peroxide, vinegar, or human ear drops.
• Fill the canal with cleaner, gently massage the base of the ear for a few seconds, let your dog shake its head, then wipe away what comes up with cotton wool or gauze.
• Clean only what you can see. Never push a cotton bud down into the canal, which packs debris deeper and can injure the eardrum.
• Dry the ears after every bath or swim, and after wet weather.
• Stop and call your vet if cleaning causes pain, or if you see fresh blood or a sudden change in balance.

If your dog is already sore, do not start a cleaning routine yourself first. Let the vet settle the infection, then follow their plan for maintenance.

• Dry the ears thoroughly after baths, swims, and rainy days.
• Check the ears weekly, more often in floppy-eared breeds and during the humid months, looking for redness, smell, or discharge.
• Keep up with any allergy management your vet has advised, since controlling the allergy is what prevents most repeat infections.
• Ask your vet before plucking ear hair or starting regular cleaning, as over-cleaning a healthy ear can irritate it.
• Act early. A faint smell or a bit of head shaking is far easier to treat than a canal that has been infected for weeks.

No single step is a guarantee, so combine dry ears, regular checks, and treating the root cause. That layered approach keeps ear infections rare and mild.

Omelo does not diagnose, treat, or prescribe, and it cannot tell yeast from bacteria from mites. Only a vet with an otoscope and a swab can do that. Think of the app as the step that helps you decide to go and how fast, not a replacement for the clinic.

In India, if you would like a licensed vet to weigh in before you travel, you can book a 15-minute video consultation for ₹349 at vet.beomelo.com. A vet can look at the ear and symptoms you are seeing and help you plan the next step, including an in-person exam and swab when that is needed.

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