Types of Ear Infections in Dogs With Treatment – UK Pet Owners Should Know About

• 04 Aug 2025
• 1 year ago

Ear infections are one of the most common health issues that bring dogs to the vet. They can be uncomfortable, painful, and if left untreated, can lead to hearing loss or more serious complications. Whether you have a playful Labrador, a floppy-eared Spaniel, or a tiny Terrier, understanding ear infections and their treatment can help you keep your furry friend happy and healthy.

What Are Ear Infections in Dogs?

A dog’s ear is more complex than a human ear, with an L-shaped canal that easily traps moisture, wax, and debris. This makes dogs more prone to infections. Ear infections are typically caused by bacteria, yeast, parasites, allergies, or even structural issues in the ear canal.

There are three main types of ear infections, based on which part of the ear is affected:

• Otitis Externa: Infection of the outer ear canal (most common).
• Otitis Media: Infection of the middle ear, often caused by untreated outer ear infections.
• Otitis Interna: Infection of the inner ear, which is more serious and can affect balance and hearing.

Ear infections may be a one-time issue or a recurring problem, often linked to allergies or breed-specific ear structures.

Common Symptoms of Ear Infections in Dogs

Dogs with ear infections often show obvious discomfort. Watch for:

• Persistent scratching or pawing at the ears
• Head shaking or tilting
• Redness or swelling inside the ear canal
• Discharge – may be brown, yellow, or green
• Bad odour coming from the ear
• Sensitivity or pain when touching the ear
• Loss of balance or coordination (with severe inner ear infections)
• Hearing loss in chronic or advanced cases

If your dog is showing any of these signs, especially combined symptoms like pain and discharge, it’s best to seek veterinary advice quickly.

Types of Ear Infections in Dogs

1. Otitis Externa (Outer Ear Infection)

The most common ear infection affecting the external ear canal.

Causes:

• Bacteria (e.g., Staphylococcus, Pseudomonas)
• Yeast (Malassezia)
• Ear mites
• Allergies (environmental or food)
• Excess moisture or wax build-up

Symptoms:

• Head shaking, ear scratching
• Redness and discharge
• Bad odour

Treatment:

• Vet cleaning of the ear canal
• Prescription medicated drops (antibiotic, antifungal, or steroid-based)
• Treating underlying causes like mites or allergies

2. Otitis Media (Middle Ear Infection)

A deeper infection in the middle ear, often developing after untreated otitis externa.

Causes:

• Spread of infection from the outer ear
• Trauma or ruptured eardrum
• Tumours or polyps

Symptoms:

• Head tilt and loss of balance
• Pain and sometimes facial paralysis
• Hearing loss

Treatment:

• Long-term oral antibiotics or antifungal medication
• Pain relief and anti-inflammatory drugs
• Ear flushing under anaesthesia
• Surgery in chronic or severe cases

3. Otitis Interna (Inner Ear Infection)

A serious infection affecting the inner ear, often spreading from untreated middle ear infections.

Symptoms:

• Severe head tilt and loss of balance
• Abnormal eye movement (nystagmus)
• Hearing loss and sometimes vomiting

Treatment:

• Hospitalisation for severe cases
• Long courses of antibiotics or antifungal treatment (6–8 weeks or more)
• Anti-inflammatory and pain management
• Surgery in advanced cases.

4. Ear Mite Infestation

Tiny parasites that irritate the ear canal, causing inflammation and infection.

Symptoms:

• Intense itching and head shaking
• Dark, crumbly discharge (like coffee grounds)

Treatment:

• Treating all pets in contact to prevent reinfestation
• Prescription anti-parasitic ear drops
• Thorough ear cleaning

5. Yeast (Fungal) Ear Infections

Caused by overgrowth of yeast, often linked to allergies or moisture.

Symptoms:

• Musty odour
• Brown or black discharge
• Redness and itchiness

Treatment:

• Antifungal ear drops
• Regular ear cleaning with medicated solutions
• Managing underlying allergies

6. Bacterial Ear Infections

Caused by harmful bacteria, often secondary to allergies, moisture, or injury.

Symptoms:

• Yellow or green discharge
• Swelling and redness
• Painful ear canal

Treatment:

• Antibiotic ear drops or oral antibiotics
• Addressing root causes such as allergies or injuries

7. Foreign Body-Related Ear Infections

Grass seeds, dirt, or other debris trapped inside the ear canal can lead to infections.

Symptoms:

• Sudden head shaking and pawing at one ear
• Pain and discomfort

Treatment:

• Removal by a vet, often under sedation
• Treating any resulting infection with drops or oral medication

8. Ear Polyps and Tumours

Benign polyps or cancerous tumours blocking airflow and trapping bacteria.

Symptoms:

• Chronic infections not responding to normal treatment
• Swelling or bleeding inside the ear canal

Treatment:

• Surgical removal and biopsy
• Post-surgery infection control

9. Allergy-Linked Ear Infections

Chronic inflammation from allergies (food, pollen, dust) leading to recurrent infections.

Symptoms:

• Ongoing redness and inflammation
• Repeated infections despite cleaning

Treatment:

• Allergy testing and management (diet changes, antihistamines)
• Medicated ear drops for infection control

When to See a Vet?

Immediate veterinary consultation is needed if you notice:

• Persistent ear scratching or head shaking
• Bad odour, discharge, or redness
• Head tilt or balance problems
• Hearing loss or unusual behaviour

Quick action can prevent chronic infections and permanent ear damage.

Detailed Treatment Procedure

Veterinary Examination

Your vet will inspect the ear with an otoscope to look for foreign bodies, mites, or structural problems.

Cleaning & Debridement

Professional cleaning to remove wax, debris, and infection material.

Laboratory Tests (If Needed)

Swabs may be taken to identify bacteria, yeast, or mites.

Medication

Prescription ear drops (antibiotic, antifungal, anti-inflammatory) are given based on the cause. Oral medications for severe or chronic infections.

Surgery (For Severe or Chronic Cases)

Advanced procedures like Total Ear Canal Ablation (TECA) may be needed if infections are untreatable through routine methods.

After Treatment Precautions

• Complete the full course of medications even if symptoms improve early.
• Keep ears dry and clean, especially after swimming or bathing.
• Regular ear checks – at least once a week, especially in breeds prone to ear issues.
• Manage allergies with a vet-recommended diet or medication.
• Grooming – trim hair around ears to improve ventilation and reduce infection risk.

Final Thoughts

Ear infections in dogs are common but manageable. Knowing the types, symptoms, and treatments ensures you can act quickly and avoid long-term complications. Whether it’s a simple outer ear infection or a serious inner ear issue, early veterinary care and proper aftercare are key to your dog’s comfort and health.

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