Dog Ear Mites & Dog Ear Discharge: Causes, Symptoms & Treatments

If your dog has been scratching their ears more than usual or you’ve noticed unusual discharge, ear mites or another ear condition could be to blame. Ear problems are not only uncomfortable for dogs — they can quickly worsen without proper treatment, potentially leading to infection, chronic inflammation, or even hearing loss.

Ear mites are one possible culprit, but they’re far from the only cause of ear discharge in dogs. Understanding the difference between ear mites and other ear issues is key to helping your dog get relief quickly.

In this guide, we’ll cover:

• What ear mites are and how dogs get them
• How to tell the difference between mites and other causes of ear discharge
• Treatment options your vet may recommend
• Prevention tips for keeping your dog’s ears clean and healthy
• How Spot & Tango nutrition supports overall ear and skin health

What Are Ear Mites in Dogs?

Ear mites are tiny, highly contagious parasites that live in and around a dog’s ear canal. The most common species affecting dogs is Otodectes cynotis, which feeds on ear wax and skin oils. These mites are nearly invisible to the naked eye but cause intense irritation and inflammation.

How Dogs Get Ear Mites

• Direct contact with an infected animal — especially other dogs or cats
• Shared bedding, grooming tools, or toys that carry mites from one pet to another
• Shelters or boarding facilities where multiple animals are housed closely together

Why Ear Mites Are a Problem

• They cause severe itching, leading to scratching and head shaking
• Repeated scratching can result in secondary ear infections, open wounds, or even a hematoma (blood-filled swelling) in the ear flap
• If untreated, the inflammation can damage the ear canal and affect hearing

While ear mites are more common in puppies and rescue animals, any dog can get them, making awareness and early treatment essential.

Signs Your Dog Has Ear Mites

Ear mites cause intense irritation, and their symptoms can be quite noticeable once you know what to look for. Common signs include:

• Excessive scratching at one or both ears
• Frequent head shaking or tilting
• Dark, crumbly discharge resembling coffee grounds — a telltale sign of mite debris and ear wax
• Redness and swelling inside the ear canal
• Scabs or hair loss around the ears from repeated scratching
• Strong, musty odor from the ears

Because these symptoms can also be caused by infections or allergies, a proper veterinary diagnosis is important before starting any treatment. Your vet can confirm the presence of mites with a simple ear swab examined under a microscope.

Other Causes of Ear Discharge in Dogs (Not Just Mites)

While ear mites are a common concern, there are several other conditions that can cause ear discharge in dogs. Recognizing the differences can help guide treatment and prevent unnecessary discomfort.

1. Ear Infections (Bacterial or Yeast)

• Often produce yellow, brown, or black discharge
• Typically accompanied by odor, redness, and swelling
• Can be secondary to allergies, moisture buildup, or foreign bodies

2. Allergies

• Environmental or food allergies can cause chronic inflammation of the ear canal
• Discharge may be clear, yellow, or waxy
• Often paired with itching in other areas of the body

3. Ear Polyps or Growths

• Benign or malignant growths inside the ear canal can produce mucus-like discharge
• May require surgical removal to restore comfort and ear function

4. Foreign Bodies

• Grass seeds, dirt, or other debris lodged in the ear can cause irritation and discharge
• Dogs may shake their head persistently or paw at the ear

5. Trauma or Injury

• Scratches or bites near the ear can lead to blood-tinged discharge
• May also occur from overzealous cleaning or aggressive scratching

Because discharge alone can’t confirm the cause, it’s best to have your vet examine your dog’s ears before attempting treatment.

How Vets Diagnose Ear Mites vs. Other Ear Problems

Because many ear conditions share similar symptoms, a vet’s exam is the most reliable way to pinpoint the cause of your dog’s ear issues. During a visit, your veterinarian may:

• Perform a physical ear exam with an otoscope to look inside the ear canal.
• Collect a sample of ear debris with a cotton swab for microscopic examination.
• Identify mites directly under the microscope or rule out bacterial and yeast infections.
• Assess for secondary issues like skin trauma, swelling, or hematomas caused by scratching.

This step is crucial. Treating for mites when the issue is actually an infection or allergy can delay proper care and make the problem worse.

Treatment for Ear Mites in Dogs

If your dog is diagnosed with ear mites, treatment aims to eliminate the parasites, soothe irritation, and prevent reinfection.

Typical Treatment Plan:

Ear Cleaning

• Your vet will remove debris and mite waste from the ear canal.
• This step allows medication to reach the mites more effectively.

Prescription Medications

• Topical treatments (ear drops or ointments) kill adult mites and larvae.
• Systemic treatments (oral or injectable medications) may be used in severe infestations.

Treat All Pets in the Household

• Mites spread easily, so all dogs and cats in the home should be treated—even if they’re not showing symptoms.

Follow-Up Exams

• Your vet may recommend a recheck after 2–4 weeks to ensure mites are gone and the ears are healing.

Important Tips:

• Stick to the full treatment course, even if symptoms improve quickly.
• Avoid over-the-counter mite remedies without a vet’s guidance—they may be less effective or irritating to the ear canal.

Treatment for Other Causes of Ear Discharge

If your dog’s ear discharge is not due to mites, treatment will depend on the underlying cause. Your vet may recommend:

1. Bacterial or Yeast Infections

• Prescription antibiotic or antifungal ear drops
• Oral medications for severe or chronic cases
• Thorough cleaning of the ear canal to remove debris and allow medication to work

2. Allergies

• Anti-inflammatory medications or steroid drops to reduce swelling and itching
• Allergy testing to identify triggers
• Dietary changes to hypoallergenic or limited-ingredient diets to reduce flare-ups

3. Ear Polyps or Growths

• Surgical removal if they obstruct the canal or cause chronic discharge
• Biopsy to determine if the growth is benign or malignant

4. Foreign Bodies

• Gentle removal under sedation to avoid damaging the ear canal
• Post-removal anti-inflammatory or antibiotic drops to prevent infection

5. Injury or Trauma

• Cleaning and treating wounds around the ear
• Pain management and infection prevention with prescribed medications

Home Care & What Not to Do

While waiting for a vet visit or supporting recovery, you can take steps to keep your dog comfortable and prevent further irritation.

Safe Home Care:

• Clean the outer ear with a vet-approved ear cleaner and cotton balls or pads (never insert anything into the canal).
• Dry ears thoroughly after baths or swimming to prevent moisture buildup.
• Use an e-collar if your dog is scratching excessively to prevent injury.

What to Avoid:

• Cotton swabs inside the ear canal — these can push debris further in and cause damage.
• Homemade remedies like vinegar or hydrogen peroxide without vet approval — these can irritate or worsen ear problems.
• Leftover medications from past ear issues — incorrect treatment can mask symptoms without solving the problem.
• Assuming all discharge means mites — wrong treatment delays recovery and may cause complications.

Tip: If your dog’s ear smells bad, is red, swollen, or painful, skip home remedies and get a professional exam as soon as possible.

Prevention Tips for Healthy Dog Ears

Many ear problems in dogs can be avoided with regular care and a proactive approach.

1. Regular Ear Checks

Look inside your dog’s ears weekly for redness, swelling, discharge, or foul odor. Early detection helps prevent minor issues from becoming major problems.

2. Routine Cleaning

Use a vet-approved ear cleaner to gently clean your dog’s ears every 2–4 weeks—or more often if your vet recommends it for a breed prone to ear problems.

3. Keep Ears Dry

Moisture encourages bacterial and yeast growth. Always dry your dog’s ears thoroughly after swimming or bathing.

4. Grooming Care

For dogs with long ear hair, regular trimming can improve air circulation and reduce trapped debris.

5. Support Immune Health

A healthy immune system helps your dog fight off parasites, infections, and inflammation more effectively. Diet plays a big role in this.

Spot & Tango’s Role in Ear Health

Ear health starts from the inside out, and diet is a key factor. Many chronic ear problems are linked to food allergies or intolerances that cause inflammation in the skin and ears.

Spot & Tango’s Fresh and UnKibble™ recipes are crafted to:

• Avoid common allergens like corn, wheat, and soy
• Use real, human-grade proteins for optimal nutrition
• Include omega-3 and omega-6 fatty acids to support skin and coat health
• Provide antioxidants to boost immune defenses against infections

A consistent, high-quality diet can help reduce flare-ups and keep your dog’s ears healthier year-round.

Take The Spot & Tango Quiz For Personalized Food Recommendations!

Don’t Ignore Ear Problems in Dogs

Whether it’s ear mites or another condition, ear issues in dogs can quickly escalate if ignored. Early diagnosis and treatment prevent long-term discomfort and potential hearing loss.

By combining regular ear care, prompt veterinary attention, and a diet that supports overall health, you can help your dog avoid many common ear problems.

Ready to support your dog’s health from the inside out?

Explore Spot & Tango’s Fresh & UnKibble™ Recipes for clean, balanced nutrition designed to keep your dog healthier—ears included.

FAQs About Dog Ear Mites & Ear Discharge

Can ear mites go away on their own?

No. Ear mites require veterinary treatment to eliminate them completely.

Are ear mites contagious to humans?

Rarely, but it’s possible in very close contact situations. They are far more likely to spread between pets.

What color should healthy dog ear wax be?

Light yellow to pale brown is normal. Dark brown, black, yellow-green, or foul-smelling discharge may indicate a problem.

How long does it take to get rid of ear mites?

With proper treatment, most cases resolve in 2–4 weeks, though follow-up care is important.

Is ear discharge always a sign of infection?

Not always—it can be caused by mites, allergies, injury, or growths. Only a vet can determine the exact cause.