Itchy Ears in Dogs: Causes, Symptoms and Vet-Approved Relief

By Dr Duncan Houston

Quick Answer

Itchy ears in dogs are commonly caused by ear infections, allergies, ear mites, trapped moisture, or debris in the ear canal. Mild irritation can quickly turn into a painful infection, so persistent scratching, head shaking, bad smell, discharge, or redness should be checked early.

As a veterinarian, I often see ear problems start as simple irritation and then worsen because the underlying cause is missed. The key is treating the reason for the itch, not just the scratching.

If your dog is constantly scratching their ears, shaking their head, or rubbing their face along the carpet like they are trying to solve the problem themselves, it is time to pay attention.

Itchy ears are common, but they are not something to ignore. Left untreated, they can become painful, infected, and much harder to manage.

Common Causes of Itchy Ears in Dogs

Ear Infections

Ear infections are one of the most common causes of itchy ears in dogs.

These may involve:

• Yeast

• Bacteria

• A mix of both

Signs often include:

• Bad smell

• Redness

• Discharge

• Frequent head shaking

• Scratching at the ears

Allergies

Allergies are a major reason dogs develop ongoing ear irritation.

These can include:

• Environmental allergies such as pollen, grass, or dust

• Food allergies

• Flea allergy dermatitis

For many dogs, itchy ears are one of the first visible signs of an allergic flare.

Ear Mites

Ear mites are more common in puppies, rescue dogs, and animals living closely with other pets.

They can cause:

• Intense itching

• Dark debris in the ear

• Head shaking

• Inflammation

They are less common in adult dogs than infections or allergies, but still worth considering.

Water or Foreign Material

Moisture trapped in the ear after bathing or swimming can irritate the ear canal and encourage infection.

Foreign material such as:

• Grass seeds

• Dirt

• Plant matter

• Wax build-up

can also trigger sudden irritation.

Excess Wax or Hair

Some dogs naturally produce more ear wax or grow heavy hair inside the ear canal, which can trap moisture and debris.

This can create the perfect environment for inflammation and infection.

Signs Your Dog’s Ear Problem May Be More Than Simple Irritation

Watch for:

• Constant scratching

• Head shaking

• Rubbing the face or ears on the floor

• Red or swollen ears

• Strong smell

• Brown, yellow, or black discharge

• Pain when the ear is touched

• Crying or pulling away

• Tilting the head

If any of these are happening, it is time for a proper check.

How Vets Diagnose the Cause

Ear problems can look similar from the outside, but the underlying cause may be completely different.

Your vet may use:

Otoscope Examination

This allows the ear canal and eardrum to be examined more closely.

Ear Cytology

A sample of ear debris is examined under the microscope to look for yeast, bacteria, mites, and inflammatory cells.

Culture and Sensitivity Testing

This may be needed in chronic, severe, or recurrent infections to identify the exact bacteria involved and choose the right medication.

Allergy Investigation

If ear issues keep coming back, your vet may investigate food or environmental allergies.

Treatment Options

Treatment depends on the cause.

For Ear Infections

Treatment may include:

• Medicated ear drops

• Antibiotic medication

• Antifungal medication

• Anti-inflammatory treatment

Some dogs with severe infection or very swollen canals may also need oral medication.

For Allergies

If allergies are driving the ear inflammation, treatment may include:

• Anti-itch medication

• Allergy management plans

• Diet trials

• Flea control

• Long-term skin support

Unless the allergy is addressed, the ear problem often keeps returning.

For Ear Mites

Prescription parasite control is usually needed. This may include products that treat mites as part of a broader flea and parasite prevention plan.

For Foreign Material

If something is lodged in the ear, it needs to be removed properly. Grass seeds are a classic troublemaker and can cause sudden, severe pain.

Ear Cleaning Tips

Cleaning can help, but only when done correctly.

• Use a vet-approved ear cleanser

• Fill the ear canal gently with cleaner

• Massage the base of the ear

• Let your dog shake

• Wipe away excess with cotton pads or gauze

Do not push cotton buds deep into the ear canal. That usually just packs debris further in and annoys everyone involved.

What Not to Use

Avoid using:

• Hydrogen peroxide

• Alcohol

• Random over-the-counter products not recommended by your vet

These can irritate already inflamed ears and sometimes make things worse.

When Not to Clean the Ear Yourself

Do not clean the ears at home if:

• Your dog is in significant pain

• The ear is very swollen

• There is pus or heavy discharge

• The canal looks closed

• You suspect an injury or ruptured eardrum

In those cases, get your dog examined first.

How to Help Prevent Recurring Ear Problems

You can reduce the risk of repeat issues by:

• Cleaning ears as advised by your vet

• Drying ears after swimming or bathing

• Staying on top of allergies and flea control

• Monitoring for early signs of relapse

• Getting repeated ear problems investigated properly instead of just treating them over and over

Recurring ear issues are often a clue that something more is going on underneath.

When to See a Vet

Book a vet visit if your dog has:

• Persistent scratching or head shaking

• Smelly ears

• Redness or swelling

• Discharge

• Pain when touched

• Recurrent ear issues

• Sudden one-sided ear discomfort

The earlier ear disease is treated, the easier it usually is to manage.

Final Thoughts

Itchy ears in dogs are common, but they are not always simple. Infection, allergies, mites, moisture, and foreign material can all cause very similar signs.

The sooner you work out the cause, the sooner your dog gets real relief and the less chance there is of a painful chronic problem developing.

FAQs

Can I use over-the-counter ear drops?
Only if your vet has confirmed they are appropriate. Using the wrong product can worsen the problem, especially if the eardrum is damaged.

Why does my dog’s ear smell bad?
A strong smell often suggests yeast or bacterial overgrowth and usually means infection is present.

Can itchy ears be caused by food allergies?
Yes. Some dogs with food allergies first show signs through itchy ears, recurring ear infections, or licking their paws.

If you are unsure whether your dog’s ear issue is mild irritation or something that needs treatment, the ASK A VET™ app can help you track symptoms, upload photos, and get guidance on what to do next.