Dog Ear Infection or Ear Mites? How to Tell

Name: Dog Ear Infection or Ear Mites? How to Tell
Creator: Dr. Zubair Khalid

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-08-14

Key Takeaways

Distinguishing between ear mites and bacterial/yeast infections relies heavily on the appearance and odor of ear discharge; mites typically cause dark, crumbly debris resembling coffee grounds, while infections present with wetter, variable discharge (yellow, green, brown, black) often accompanied by foul or sweet/musty odors.
Neurological signs such as head tilting, circling, inability to stand, or rapid eye flicking are critical indicators of inner ear involvement or severe pain, necessitating immediate emergency veterinary attention due to potential for inner ear disease or ruptured eardrums.
A definitive diagnosis requires microscopic examination of ear discharge by a veterinarian to identify mites, yeast, or bacteria, as visual assessment alone can be misleading due to secondary infections or mixed etiologies.
Home care should be limited to gently wiping the external ear flap with a dry cloth; introducing any liquids, powders, or cotton swabs into the ear canal is contraindicated as it can exacerbate inflammation, cause pain, or lead to permanent damage, especially if the eardrum is compromised.
Underlying causes such as allergies (food or environmental), foreign bodies, or anatomical predispositions (e.g., narrow ear canals, floppy ears) are common triggers for recurrent ear infections and must be addressed by a veterinarian for effective long-term management.
Treatment protocols are cause-specific: ear mites are managed with parasiticides, while bacterial or yeast infections require targeted antimicrobial or antifungal ear drops or oral medications, with treatment duration often extending beyond visible symptom resolution to ensure complete eradication.

If your dog is scratching their ears, shaking their head, or holding one ear low, you are probably wondering whether they have an ear infection or ear mites. The short answer is that both are common, but they look and behave differently. Ear mites are tiny parasites that live on the skin inside the ear canal, while an ear infection is caused by bacteria or yeast that overgrow in a warm, moist ear. The appearance of the discharge inside the ear is the biggest clue, but you cannot always tell the difference by looking alone.

Here is what you need to know first: most ear problems in dogs are not emergencies, but a few signs are. If your dog is tilting their head constantly, walking in circles, unable to stand, or seems dizzy, that can mean the infection has reached the inner ear. That is a true emergency. Also, if the ear is severely swollen, bleeding heavily, or your dog screams when you touch their head, stop examining and go to an emergency vet now. For everything else, read on, then call your regular veterinarian for guidance.

Is This an Emergency?

Use this table to decide how quickly your dog needs care. When in doubt, call your vet. They can hear your dog's history and tell you whether to come in today or watch at home.

{
 "type": "triage",
 "title": "Urgency triage by severity of signs",
 "tiers": [
  {
   "tier": "danger",
   "label": "Go to an emergency vet now",
   "signs": [
    "Head tilted to one side for hours, walking in circles, falling over, unable to stand, rapid eye flicking, vomiting with head tilt, severe swelling of the ear flap, blood pouring from the ear, or your dog crying out when the ear is touched"
   ],
   "action": [
    "Do not wait for a regular appointment",
    "These signs can mean inner ear disease, a ruptured eardrum, or severe pain",
    "Go immediately"
   ]
  },
  {
   "tier": "warn",
   "label": "Book a same-day appointment",
   "signs": [
    "Ear discharge that is thick, dark, or foul smelling, constant head shaking, scratching at the ear more than a few times an hour, redness inside the ear flap, pain when you gently lift the ear, or a swollen, warm ear flap"
   ],
   "action": [
    "Call your vet this morning",
    "Ear infections worsen quickly, and early treatment is simpler and cheaper"
   ]
  },
  {
   "tier": "safe",
   "label": "Watch at home for 24 to 48 hours",
   "signs": [
    "Occasional scratching (a few times a day), mild dirt or wax in the ear, no odor, no redness, no pain, and your dog otherwise eating, drinking, and acting normal"
   ],
   "action": [
    "Clean the outer ear gently with a vet-approved ear cleaner if you have one",
    "Do not put anything inside the ear canal",
    "If scratching increases or any new sign appears, book an appointment"
   ]
  }
 ]
}

Urgency Level	Signs You Might See	What to Do
Go to an emergency vet now	Head tilted to one side for hours, walking in circles, falling over, unable to stand, rapid eye flicking, vomiting with head tilt, severe swelling of the ear flap, blood pouring from the ear, or your dog crying out when the ear is touched	Do not wait for a regular appointment. These signs can mean inner ear disease, a ruptured eardrum, or severe pain. Go immediately.
Book a same-day appointment	Ear discharge that is thick, dark, or foul smelling, constant head shaking, scratching at the ear more than a few times an hour, redness inside the ear flap, pain when you gently lift the ear, or a swollen, warm ear flap	Call your vet this morning. Ear infections worsen quickly, and early treatment is simpler and cheaper.
Watch at home for 24 to 48 hours	Occasional scratching (a few times a day), mild dirt or wax in the ear, no odor, no redness, no pain, and your dog otherwise eating, drinking, and acting normal	Clean the outer ear gently with a vet-approved ear cleaner if you have one. Do not put anything inside the ear canal. If scratching increases or any new sign appears, book an appointment.

What Ear Mites Look Like

Ear mites are most common in puppies, but adult dogs can get them too, especially if they spend time with cats or other dogs that carry mites. The classic sign is dark, crumbly discharge that looks like coffee grounds or black sand. It is dry, not wet, and it often fills the ear canal. The mites themselves are tiny white specks, barely visible without a magnifying glass, but the debris they leave behind is unmistakable.

Mites cause intense itching. Your dog may scratch their ears raw, rub their head on the floor, or shake their head violently. Both ears are usually affected, even if one looks worse. Mites are contagious to other pets in the house, so if you have a cat, they may be scratching too. The good news is that mites are easily treated with prescription medication from your vet. Over-the-counter mite treatments are often ineffective and can irritate the ear, so skip them.

What an Ear Infection Looks Like

Ear infections are more common in adult dogs, especially breeds with floppy ears like Cocker Spaniels, Labradors, and Basset Hounds. The discharge is usually wetter and more variable in color. It can be yellow, green, brown, or even black. A yeast infection often produces thick, brown, waxy discharge that smells sweet or musty, like bread dough. A bacterial infection tends to produce pus that is yellow or green and smells foul, like rotting food.

The ear canal itself will look red and swollen. Your dog may yelp when you touch the ear, hold their head to one side, or refuse to let you look. Ear infections are often caused by an underlying problem, such as allergies, a foreign object like a grass seed, excess moisture from swimming, or a narrow ear canal. Treating the infection without addressing the cause means it will likely come back. Your vet will need to look inside the ear with an otoscope, a lighted instrument, to check the eardrum and see how deep the infection goes.

Why You Cannot Always Tell by Looking

Here is the tricky part: a severe ear mite infestation can cause a secondary bacterial infection, and an early infection can look like plain dirt. The color of the discharge alone is not a reliable diagnosis. Black discharge is often mites, but it can also be dried blood from a yeast infection. Brown discharge is often yeast, but it can also be mite debris mixed with wax. The only way to know for sure is to have your vet examine a sample of the discharge under a microscope. This takes minutes and is painless. They will see mites, yeast, or bacteria directly and prescribe the right treatment.

Never put anything into your dog's ear before seeing a vet, especially if you suspect a ruptured eardrum. Cleaning drops, vinegar rinses, or cotton swabs can push debris deeper and cause severe pain or permanent damage. If the eardrum is torn, certain medications can enter the middle ear and cause hearing loss. Your vet will check the eardrum first and choose safe products based on what they find.

What Else Could It Be?

Not every itchy ear is mites or an infection. Allergies, both to food and to things in the environment like pollen, are a leading cause of ear inflammation in dogs. Allergic ears look red and itchy but may have little or no discharge. A foreign body, such as a grass awn or foxtail, can lodge deep in the ear canal and cause sudden, violent head shaking. A polyp or tumor inside the ear is less common but possible, especially in older dogs. These conditions all require a veterinary examination to diagnose. The World Small Animal Veterinary Association provides guidance on allergic skin disease, and the American Veterinary Medical Association offers resources on working with your vet to get an accurate diagnosis. Your vet is the only person who can tell these apart safely.

The bottom line is that ear problems rarely resolve on their own. If you see discharge, redness, or persistent scratching, book an appointment. Early treatment is faster, less painful for your dog, and less expensive than waiting until the infection spreads deeper into the ear.

What You Can Safely Do at Home Right Now

If your dog is scratching, shaking their head, or has visible discharge, you can take a few safe steps while you decide whether to call a vet. These steps do not treat the problem. They only keep your dog comfortable and prevent the situation from getting worse.

First, look at the outside of the ear flap. If you see dried discharge, you can wipe it gently with a soft, dry cloth or a cotton ball. Do not push anything into the ear canal. Do not use cotton swabs, Q-tips, or any tool that could pack debris deeper or damage the eardrum. If the ear is painful, stop immediately. A dog that yelps or pulls away is telling you the ear hurts, and forcing anything in can cause injury.

Do not put any liquid, powder, or home remedy into the ear. This includes vinegar, alcohol, hydrogen peroxide, tea tree oil, or over-the-counter ear cleaners. These can sting, inflame the ear further, or make a small tear in the eardrum worse. If the eardrum is already damaged, some liquids can reach the middle ear and cause serious problems like dizziness or hearing loss.

You can also check the rest of your dog's skin. Ear mites often cause itching elsewhere, especially on the head, neck, belly, and tail base. Look for red patches, scabs, or hair loss. Write down where you see these spots and how many there are. This information helps your vet understand whether the problem is local or widespread.

Do not bathe your dog or let them swim until a vet has examined the ear. Moisture can make both infections and mite irritation worse. Keep the ear as dry as possible.

What to Write Down Before You Call

A clear description of what you observe helps a veterinarian give better advice. Before you call or book a visit, gather these details:

How many days has the scratching or head shaking been happening?
Is the discharge on one side or both sides?
What color is the discharge? Black, dark brown, yellow, or green?
Does the discharge smell? If so, describe the smell. Yeast often smells sweet or musty. Bacterial infections often smell foul or rotten.
Is the ear flap red, swollen, or warm to the touch?
Does your dog flinch when you touch the ear?
Is your dog holding their head tilted to one side?
Have you noticed any balance problems, circling, or walking in a wobbly way?
Has your dog been swimming, bathing, or in tall grass recently?
Does your dog have allergies, a history of ear problems, or other pets in the home?

If your dog has a head tilt, balance trouble, or is walking in circles, this can indicate a deeper problem such as a ruptured eardrum or middle ear disease. These signs need an in-person examination soon, not a remote consult.

A Comparison Guide for What You See

The table below summarizes the most common visible differences. Use it as a starting point, not a diagnosis. Many ears look similar, and only a vet can tell for certain.

Sign	Ear Mites (Most Likely)	Ear Infection (Most Likely)
Discharge color	Dark brown or black	Yellow, green, or dark brown
Discharge texture	Crumbly, like coffee grounds	Thick, waxy, or creamy
Smell	Usually mild or none	Often strong, foul, or sweet
Ear flap redness	Mild or absent	Often red, swollen, warm
Pain when touched	Mild to moderate	Often severe
Itching elsewhere	Common, especially head and tail	Less common
Both ears affected	Very common	Possible, but often one side worse
Ear mites visible	Tiny white moving specks	None

What to Do Next: A Simple Decision Guide

Situation	What to Do
Mild scratching, no discharge, no smell	Call your vet for advice. A remote consult may be enough to start.
Dark crumbly discharge, both ears, no pain	Book an in-person visit. This pattern suggests mites, but a vet must confirm.
Yellow or green discharge, strong smell, painful ear	Book an in-person visit soon. This suggests infection and needs a proper exam.
Head tilt, balance problems, circling, or very painful ear	Seek in-person veterinary care today. Do not wait.
Ear looks worse after any home cleaning	Stop all home care and contact your vet.
Scratching continues for more than two days	Have the ear examined. Prolonged scratching can cause a hematoma, a blood-filled swelling of the ear flap that often needs surgery.

What a Veterinary Visit Usually Involves

When you bring your dog in, the vet will ask about the history you wrote down. They will then examine both ears with an otoscope, a tool with a light and magnifying lens that lets them see down the ear canal. This is important because it checks the eardrum for damage. If the eardrum is torn, certain treatments are unsafe.

The vet will likely take a sample of the discharge on a cotton swab and look at it under a microscope. This test, called cytology, can quickly show whether the problem is bacteria, yeast, or mites. In many cases, this is enough to start treatment. If the infection is severe, repeated, or not responding to treatment, the vet may recommend a culture to identify the exact bacteria and the most effective medication.

Treatment depends on the cause. Ear mites are treated with medications that kill the mites, often applied to the skin or given by mouth. Ear infections are treated with medicated ear drops or oral medications. The vet will choose the drug class and dose based on your dog's weight, the type of infection, and the condition of the eardrum. You should never give a dog leftover ear medication from another pet or a previous illness. The dose and drug must match this specific infection.

The cost of a visit varies widely by region and clinic. A basic ear exam and cytology might fall in a modest range, while a culture, imaging, or referral to a specialist can cost much more. Ask your clinic for an estimate before treatment begins. Many clinics offer payment plans or pet insurance options.

When an Online Vet Can Help, and When It Cannot

Some situations in this article require hands-on care and must not be handled remotely. If your dog has a head tilt, balance problems, circling, a very painful ear, or signs of a ruptured eardrum, you need an in-person visit. A remote veterinarian cannot examine the ear canal, check the eardrum, or take a sample for testing. Guessing in these cases can delay proper treatment and cause harm.

A remote consultation is genuinely useful for early or mild signs. If your dog just started scratching and there is no discharge, no smell, and no pain, a video call can help you decide whether a visit is needed. It is also helpful for a recheck on a known problem, a question about whether a sign warrants a visit, a medication side effect question, or a follow-up on a chronic condition like allergies.

A remote veterinarian can take a history, look at visible signs on video, advise you, and in many states prescribe medication. But they cannot palpate the abdomen, listen to the chest, take a temperature, run bloodwork, or image anything. Prescribing rules differ by state, and a veterinarian may require an in-person examination before prescribing. For ear problems, the safest path is usually a hands-on exam, because the eardrum and the type of infection cannot be assessed from a screen.

Common Mistakes Owners Make

Many well-meaning owners delay healing by trying to guess the problem. Here are the most frequent errors and the better path.

Common Mistake or Myth	What to Do Instead
Cleaning ears with cotton swabs, pushing debris deeper	Wipe only the outer ear flap with a soft cloth or cotton ball. Never insert anything into the ear canal.
Assuming dark discharge always means ear mites	Dark wax can also come from a yeast infection. Let a veterinarian look under a microscope to tell the difference.
Using leftover ear drops from a previous illness	Old medication may be expired, the wrong type, or the wrong dose. Using it can mask signs or cause resistance.
Waiting a week to see if it clears on its own	Ear problems rarely resolve without treatment. They often worsen. Seek care within a day or two of noticing signs.
Stopping medication as soon as the ear looks clean	Infection can persist below the surface. Finish the full course your veterinarian prescribes, even if the ear appears normal.

The most costly mistake is assuming you can diagnose by sight alone. Ear mites and infections can look nearly identical, and some dogs have both at once. A quick microscope check of ear debris gives a definitive answer. The American Veterinary Medical Association advises working with your veterinarian to confirm a diagnosis before starting treatment.

How to Reduce the Chance of It Happening Again

Prevention starts with keeping ears dry and clean. After baths or swimming, gently dry the outer ear with a soft towel. Moisture trapped in the canal creates an ideal environment for yeast and bacteria.

Check your dog's ears weekly. Lift the flap and look for redness, swelling, odor, or discharge. Catching problems early makes treatment shorter and simpler. The World Small Animal Veterinary Association highlights that regular skin and ear checks are part of good dermatologic care.

Address underlying causes. Many dogs get repeat infections because of allergies, narrow ear canals, or excess hair in the canal. Your veterinarian can help identify these factors. For allergic dogs, managing the allergy often reduces ear flare-ups. Keep follow-up appointments even if the ear looks better, because some conditions need ongoing control.

What Recovery and Ongoing Management Usually Look Like

Most uncomplicated ear infections improve within 5 to 7 days of starting treatment. Ear mites typically require two to four weeks of treatment to break the full life cycle, including eggs that hatch later. Your veterinarian will tell you the exact duration for your dog.

During recovery, expect some head shaking and scratching to continue for the first few days. That is normal as inflammation settles. If signs worsen or do not improve within 48 hours of starting treatment, contact your veterinarian. The MSD Veterinary Manual Pet Owner Version notes that some infections need a second look or a different medication.

Chronic cases need more time. Dogs with allergies or structural ear issues may need long-term maintenance, such as periodic cleaning or prescription products. Your veterinarian will build a plan tailored to your dog. Do not skip recheck visits. A follow-up exam confirms the infection has truly cleared, also improved.

Frequently Asked Questions

Can I use olive oil or vinegar to clean my dog's ears?

No. Home remedies like vinegar, alcohol, or oils can irritate inflamed skin and make the problem worse. They also change the ear environment in ways that can encourage more growth. Use only products your veterinarian recommends. If you want to clean the outer ear at home, use a plain damp cloth on the flap only. Anything poured into the canal should come from a veterinary-approved ear cleaner.

How do I know if my dog needs to see a vet today or if I can wait until tomorrow?

If your dog is in pain, has a swollen ear flap, tilts its head constantly, or cannot eat or sleep normally, seek care the same day. If the only signs are mild scratching and slight discharge, calling your vet for advice within 24 hours is reasonable. Never wait more than two days. Ear problems can progress quickly, and a ruptured eardrum is a real risk with untreated infection.

Will my dog need sedation for an ear exam?

Many dogs tolerate an ear exam with gentle handling alone. If your dog is painful, anxious, or has a very narrow canal, the veterinarian may recommend light sedation. Sedation keeps the exam safe and comfortable and allows a thorough look at the eardrum. It is routine and low risk. Ask your veterinarian what they recommend for your dog's temperament.

Can ear mites spread to other pets or to people?

Ear mites spread easily between dogs and cats through close contact. They can also spread to other animals in the home, so treat all pets that have been in contact. Ear mites do not typically live on humans, but they can cause a temporary itchy rash on rare occasions. Wash your hands after handling an affected pet and clean bedding in hot water.

Why does my dog's ear still smell after treatment?

A lingering odor can mean the infection is not fully cleared, or that debris is still present deep in the canal. It can also indicate a different organizm, such as a resistant bacteria or a foreign object. Do not add more medication on your own. Return for a recheck. The veterinarian can re-examine the ear and adjust the treatment plan.

How often should I clean my dog's ears when healthy?

For most dogs, once a month is enough. Dogs that swim frequently, have floppy ears, or have a history of infections may need weekly cleaning. Use a veterinary-approved ear cleaner and follow the label directions. Over-cleaning can strip protective oils and cause irritation. Your veterinarian can recommend a schedule based on your dog's breed and history.

Related Clinical & Scientific Guides

References and Further Reading

This article is general educational information for pet owners. It is not a substitute for veterinary diagnosis, examination, or treatment. If your pet is showing severe or rapidly worsening signs, contact an emergency veterinary hospital immediately.