Ear Infections in Dogs

Ear infections in dogs usually involve inflammation and infection of the outer ear canal, called otitis externa. They are common in dogs of all ages, especially those with allergies, floppy or hairy ears, or repeated moisture in the ears.

Talk to a vet

Urgent

Prompt veterinary care is recommended

Ear infections are not usually a true emergency, but they are painful and can worsen quickly. Call your vet promptly if your dog has ear pain, head shaking, discharge, bad odor, swelling, balance changes, or recurrent ear problems. Seek urgent care right away if your dog has severe pain, a head tilt, vomiting, loss of balance, facial droop, or seems unable to hear normally.

Symptoms to Watch For

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Ear scratching

Frequent scratching or rubbing at one or both ears.

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Head shaking

Repeated head shaking is one of the most common early signs.

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Bad ear odor

A strong smell can suggest yeast or bacterial overgrowth.

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Discharge or wax buildup

Brown, yellow, or pus-like debris may be visible in the ear canal.

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Pain or sensitivity

Dogs may yelp, pull away, or resist having the ear touched.

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Head tilt or balance problems

These can happen if infection spreads deeper into the middle or inner ear.

What Causes Ear Infections

Most dog ear infections involve otitis externa, which means inflammation of the external ear canal. Veterinary sources emphasize that successful treatment depends on identifying both the infection and the underlying reason the ear became unhealthy in the first place. Bacteria and yeast commonly act as secondary overgrowth organisms, while allergies are one of the most common underlying drivers of recurrent disease. Ear infections may also involve the middle or inner ear in more severe or chronic cases.

Underlying allergies, including environmental allergies and adverse food reactions
Moisture trapped in the ears after bathing or swimming
Ear canal shape or anatomy, including pendulous ears, narrow canals, or heavy hair in the canal
Excess wax, chronic inflammation, or poor ventilation inside the ear canal
Ear mites or, less commonly, other parasites
Foreign material such as plant awns or debris
Polyps, masses, or other obstructive ear disease
Endocrine or skin disease that makes the skin and ears more vulnerable to inflammation and infection

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How It's Diagnosed

A veterinary exam is important because ear infections can look similar on the surface but require different treatment plans. Your vet will usually examine the ear canal with an otoscope to check for swelling, discharge, foreign material, and whether the eardrum appears intact. A sample of ear debris is typically examined under the microscope to identify yeast, bacteria, inflammatory cells, or mites. In more severe, chronic, or recurrent cases, additional testing may be needed to look for resistant infection or deeper disease.

Physical exam and ear history, including recurrence, allergies, swimming, and prior treatment response
Otoscopic exam to inspect the ear canal and eardrum
Ear cytology to identify yeast, bacteria, mites, and inflammation
Culture and susceptibility testing for severe, chronic, or poorly responsive cases
Sedation or anesthesia if the ear is too painful to examine safely or needs deep cleaning
Further workup for underlying causes, such as allergy evaluation or investigation for masses or middle ear disease

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Treatment Options

Treatment depends on what the vet finds during examination and cytology. Many uncomplicated outer ear infections are treated with professional ear cleaning plus prescription ear medication targeted to the organisms present and the level of inflammation. Chronic or recurrent cases often require a longer treatment course and management of the underlying cause, especially allergies. More advanced disease involving the middle or inner ear may require deeper diagnostics, oral medications, and sometimes surgery.

Veterinary ear cleaning to remove debris so medication can reach the diseased tissue
Prescription topical ear medications chosen based on cytology and eardrum status
Anti-inflammatory treatment to reduce pain, swelling, and canal narrowing
Treatment of underlying allergies, parasites, foreign bodies, or skin disease to prevent recurrence
Culture-guided treatment for resistant or recurrent infections
Surgery in select chronic end-stage cases or when masses or severe structural change are present

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About 20%

Estimated dogs affected

AKC notes an estimated 20% of dogs have some form of ear disease.

Up to 43%

Allergy link in chronic cases

VCA reports allergies are a component of ear infections in as many as 43% of dogs with chronic or recurrent disease.

$150-$450

Typical first-line care cost

Typical costs may include exam, ear cytology, cleaning, and prescription medication, but prices vary by region and severity.

$3,500-$6,000

Advanced surgery cost

If a dog develops severe chronic end-stage ear disease and needs total ear canal ablation surgery, costs can be much higher.

Living with Ear Infections

Without Management

With Proper Care

Ear infections may keep coming back because the underlying problem is never identified.

Working with your vet to address allergies, moisture, anatomy, or skin disease can reduce recurrence.

Pain, odor, discharge, and scratching can worsen, and the ear canal may become chronically thickened.

Prompt treatment and rechecks can improve comfort and help protect the ear canal from long-term damage.

Repeated inflammation can increase the risk of deeper infection involving the middle or inner ear.

Early diagnosis and appropriate therapy can lower the risk of complications such as balance changes or hearing problems.

At-home treatment with the wrong product may delay care or irritate the ear further.

Vet-directed cleaning and medication are safer and more effective, especially when the eardrum status is uncertain.

Frequently Asked Questions

Can a dog ear infection go away on its own?

Sometimes mild irritation may improve if the trigger is removed, but true ear infections usually need veterinary treatment. Because pain, yeast, bacteria, mites, foreign bodies, and eardrum problems can all look similar, it is safest to call your vet instead of waiting.

What are the first signs of an ear infection in dogs?

Common early signs include head shaking, scratching at the ears, redness, odor, wax or discharge, and sensitivity when the ear is touched. Some dogs also seem restless or rub the side of the head on furniture or the floor.

Are some dog breeds more likely to get ear infections?

Yes. Dogs with floppy ears, narrow ear canals, or heavy ear hair may be at higher risk, and recurrent infections are also common in dogs with allergies. Breeds often mentioned as predisposed include Cocker Spaniels, Miniature Poodles, and Old English Sheepdogs, although any dog can develop an ear infection.

How do vets treat dog ear infections?

Treatment usually includes examining the ear, checking ear debris under the microscope, cleaning the ear, and prescribing medication based on the organisms present and the condition of the eardrum. Chronic or severe cases may also need culture testing, treatment for allergies or other underlying disease, and follow-up exams.

When is a dog ear infection an emergency?

Seek urgent veterinary care if your dog has severe pain, marked swelling, bleeding, a head tilt, trouble walking, vomiting, eye flicking movements, facial droop, or suddenly seems unable to hear. These signs can suggest more serious disease involving the middle or inner ear.

Can I clean my dog's ears at home during an infection?

Only use a cleaner or treatment your veterinarian has recommended. Over-cleaning can irritate the ear, and some products are not safe if the eardrum is ruptured or if the diagnosis is wrong. If you are unsure, call your vet before putting anything into the ear.

Sources

Disclaimer: The information provided in this article is for educational purposes only and does not constitute veterinary medical advice. Reading this content does not establish a veterinarian-client-patient relationship. Every pet is different — always consult a licensed veterinarian before making decisions about your pet's health, diet, or care. If you'd like personalized guidance, you can talk to one of our vets. If your pet is experiencing a medical emergency, contact your local emergency animal hospital immediately.

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