Is Your Dog’s Ear Irritated? What to Notice and When to Call a Vet

By Della Ruiz | Informational guidance only; a veterinarian must diagnose the cause of an ear problem.

The short answer: signs that your dog’s ear needs attention

Repeated head shaking, persistent scratching or rubbing, an unpleasant smell, redness, swelling, pain, touch sensitivity, and unusual discharge or excess debris are common signs of a possible ear infection—or another disorder affecting the ear.

Dogs may also rub the side of the face on carpet or furniture, hold one ear lower, avoid touch near the head, yelp or whimper, withdraw, or play less than usual. These behavioral changes can appear before the ear looks obviously abnormal. PetMD’s veterinarian-authored guide describes these common signs and the need for veterinary confirmation.

Several signs together are more concerning than one isolated action. A single scratch or brief head shake that stops, followed by completely normal behavior, may not mean anything is wrong. Repeated behavior—especially with odor, discharge, redness, swelling, or pain—makes an ear problem more likely and is worth reporting to a veterinarian.

You may be able to recognize that your dog’s ear is abnormal or uncomfortable, but you cannot confirm an infection or identify its cause at home. Bacteria, yeast, mites, allergies, excess wax, trapped moisture, injury, foreign material, or a growth can produce overlapping signs. Smell, discharge color, and texture cannot reliably identify which problem is responsible.

For persistent symptoms confined to the ear, contact your veterinary clinic promptly rather than waiting a fixed number of days. Seek urgent assessment if a head tilt occurs with stumbling, circling, loss of balance, unusual eye movements, facial drooping, unequal blinking, difficulty standing, sudden hearing change, or severe pain. Bay Area Pet Hospital identifies balance, posture, facial, and severe-pain changes as urgent warning signs.

What to look, smell, and listen for

You do not need to probe or clean the ear canal to make useful observations. Look only at what is readily visible, compare the two ears, and consider what is normal for your dog.

Behavior

Watch for:

• Repeated head shaking or ear flapping
• Pawing or scratching at an ear
• Rubbing the ear or side of the face against floors, furniture, or bedding
• Holding one ear differently or lower than the other
• Resisting touch near the ear, head, or neck
• Acting withdrawn, irritable, restless, or quieter than usual
• Playing less because of discomfort
• Whimpering or yelping while scratching or when the ear is touched

Frequency and persistence matter. An occasional scratch is less concerning than scratching or shaking that repeatedly interrupts sleep, play, eating, or ordinary interaction.

Appearance

Without inserting anything into the canal, look for:

• Redness around the opening or on the inner surface of the ear flap
• Swelling in or around the canal
• Scabs, crusts, sores, or broken skin
• Hair loss caused by scratching or rubbing
• Damp or matted hair around the opening
• Moist or irritated skin
• Sudden swelling of the ear flap

A swollen ear flap can develop when vigorous scratching or shaking damages blood vessels and creates an aural hematoma. It warrants prompt veterinary contact even if the original irritation appears to be inside the canal.

Discharge and debris

Concerning material may be:

• More abundant than your dog’s usual wax
• Dark brown or black
• Yellow, greenish, or white
• Thick, sticky, slimy, chunky, or pus-like
• Dry and crumbly
• Bloody or tinged with blood

Color and texture are useful details to report, but they cannot identify the cause. Bacterial and yeast problems can produce several colors and consistencies, while mites, excess wax, dried blood, and secondary infection can overlap. This veterinarian-reviewed overview summarizes the range of discharge, redness, pain, and behavioral signs.

Odor

A new strong, sour, musty, pungent, foul, or otherwise unpleasant smell is abnormal enough to mention to your veterinarian. Describe it in ordinary terms if helpful, but do not use the odor to select a treatment. Both bacterial and yeast-related disease can smell unpleasant, and people describe odors differently.

Comparing the two ears may help, although an apparently normal second ear does not rule out a problem. Some dogs have a mild baseline ear scent; the more useful question is whether the smell is new or noticeably stronger.

Pain

Pain increases the urgency. Signs can include:

• Pulling or jerking away from touch
• Yelping, whimpering, or growling when the ear is approached
• Marked sensitivity around the head
• Guarding one side of the face
• Restlessness or difficulty getting comfortable

Do not force an inspection if your dog is distressed. Contact the clinic and explain how strongly your dog is reacting.

Normal earwax versus a concerning ear change

A small amount of earwax is normal. Healthy wax may be light brown to yellow, soft, slightly sticky, and limited in quantity. It may have no noticeable smell or only a mild, non-offensive scent. Normal appearance varies between dogs, so your dog’s usual wax level is a better reference than a universal color chart. These general characteristics are described in Broomfield Veterinary Hospital’s comparison of normal wax and mite-related debris.

Wax or debris becomes more concerning when it:

• Increases noticeably
• Quickly returns after veterinarian-approved care
• Occurs with persistent scratching or head shaking
• Has a strong or unpleasant odor
• Looks unusually wet, thick, slimy, or pus-like
• Contains blood
• Appears with redness, swelling, sores, or pain
• Mats the hair around the ear opening

No discharge color is diagnostic. Dark debris may occur with mites, but excess wax, dried blood, inflammation, and infection can create a similar appearance. Brown, yellow, white, greenish, or dark material can occur in more than one type of ear disorder.

Dark, dry, crumbly material resembling coffee grounds can raise suspicion for ear mites, particularly in a puppy or a dog exposed to an infested animal. It does not prove that mites are present. Mites can damage the skin through intense itching, and a dog may have mites and a secondary bacterial or yeast problem at the same time.

Use visible differences only to decide whether care is needed and what information to give the clinic. They are not a safe basis for choosing an antibiotic, antifungal, mite product, cleanser, or home remedy.

Watch, book a vet, or go now: an ear-symptom urgency guide

Paw Primer’s editorial approach separates observable pet-health signs into three practical levels: watch at home, book a veterinarian, and go now. It is designed to support judgment about when to seek care, not to replace veterinary diagnosis. Read more about Paw Primer’s triage-focused approach.

Watch briefly at home

Brief observation may be reasonable only when all of the following are true:

• There was one isolated scratch or head shake.
• The behavior stopped on its own.
• Your dog immediately returned to normal.
• There is no odor, unusual debris, discharge, redness, swelling, or pain.
• The behavior does not recur.
• There is no head tilt, balance change, hearing change, or unusual eye movement.

Continue ordinary observation rather than repeatedly handling the ear. If the behavior returns or another change appears, move to the next level. Paw Primer places occasional scratching or head shaking that stops in the watch category, while an ear that smells or is shaken constantly belongs in the book-a-vet category. See Paw Primer’s published three-step threshold.

Book a veterinarian

Contact your regular veterinary clinic when:

• Scratching or head shaking persists or keeps returning.
• The ear develops a new or strong smell.
• Wax, debris, or discharge increases.
• The canal opening or ear flap looks red or swollen.
• Your dog repeatedly rubs the ear on surfaces.
• Touching near the ear appears painful.
• One ear is suddenly held differently.
• The ear flap becomes swollen.
• Signs improve temporarily but return.

There is no reliable universal waiting period for every non-emergency ear symptom. A comfortable dog with mild, intermittent itching is not in the same situation as a dog with marked swelling, bleeding, or pain. Call the clinic, describe the signs and their severity, and follow its advice about appointment timing.

Go now or seek same-day advice

Seek immediate veterinary assessment for neurologic, balance, or severe-pain signs such as:

• Head tilt with stumbling, circling, or loss of balance
• Unusual rapid or repetitive eye movements
• Facial drooping or unequal blinking
• Difficulty standing or walking
• Sudden apparent hearing loss
• Marked disorientation
• Severe or rapidly escalating pain

Balance and neurologic-looking signs can occur when deeper ear structures are affected, but they do not prove that an outer-ear infection has spread inward. Other vestibular, neurologic, traumatic, or toxic causes are possible. The appropriate response is urgent veterinary assessment, not attempting to locate or treat the problem at home.

Seek same-day veterinary advice for:

• Rapid swelling around the canal
• Heavy, bloody, or pus-like discharge
• Marked lethargy or refusal to eat with ear symptoms
• A rapidly enlarging or swollen ear flap
• Vomiting accompanied by head tilt or loss of balance

PDSA advises prompt veterinary contact for suspected ear infection and a same-day appointment when a dog develops a head tilt or loses balance. It also notes that vigorous scratching or shaking can produce a swollen ear flap called an aural hematoma. See PDSA’s canine ear-infection guidance.

A swollen ear flap generally warrants prompt clinic contact rather than being treated as an emergency in every case. If it is expanding rapidly, extremely painful, bleeding, or accompanied by balance or neurologic signs, seek more urgent assessment.

Why the same symptoms do not always mean infection

An ear infection commonly involves overgrowth of bacteria, yeast, or both after inflammation or another problem changes the ear environment. But inflammation can exist without an active infection. Allergies, for example, may make an ear red and itchy before secondary bacterial or yeast overgrowth develops.

Major lookalikes and contributors include:

• Allergic inflammation: Food or environmental allergies may affect the ears and may occur with itchy skin elsewhere.
• Ear mites: These parasites can cause intense itching, shaking, redness, sensitivity, and dark debris.
• Excess wax: Wax accumulation may reflect irritation rather than being the original cause.
• Retained moisture: Swimming or bathing can leave susceptible dogs’ canals damp.
• Trauma: Scratching, inappropriate cleaning, or an injury can inflame the skin.
• Foreign material: A grass seed or another object may become lodged in the canal.
• Polyps or other masses: A growth may obstruct or irritate the canal.
• Endocrine or immune-related disease: Some underlying conditions can make recurrent inflammation more likely.

Persistent or recurring ear disease is often secondary to an underlying condition. Allergies, foreign bodies, polyps or masses, endocrine disorders, and immune-related skin disease are among the possibilities veterinarians may investigate. Allergic ear inflammation can also occur without infection. MedVet explains these distinctions and contributors.

Mites and infections overlap particularly closely. Both can cause itching, head shaking, redness, sensitivity, odor, and debris. Coffee-ground-like material is a clue—not proof—and scratching caused by mites can damage the skin enough to permit a secondary infection.

Likewise, neither odor nor color reliably separates bacteria from yeast. A musty smell does not establish yeast, and yellow or pus-like discharge does not by itself prove bacteria. Treatment based on those assumptions may miss a mixed infection, mites, allergic inflammation, or another cause.

Tell the veterinarian whether the change appeared suddenly and whether it affects one or both ears.

What to do—and not do—before the appointment

Until the ear is examined, keep your approach conservative:

• Keep the ear dry.
• Observe rather than repeatedly handling it.
• Do not force open or manipulate a severely painful ear.
• Prevent unsupervised swimming.
• Avoid getting bath water in the ear.
• Contact the clinic if pain, swelling, discharge, or balance changes worsen.

Do not insert cotton buds, tweezers, or other objects deeply into the canal. Do not use a sharp object to lift out debris.

Unless a veterinarian has specifically directed you to use a product for the current episode, do not put the following into the ear:

• Hydrogen peroxide
• Rubbing alcohol
• Homemade vinegar mixtures
• Coconut, mineral, or other oils
• Human ear medication
• Unconfirmed over-the-counter mite treatment
• Leftover prescription drops
• Medication prescribed for another animal

This caution matters because the eardrum may be damaged or impossible to assess at home. Some ear medications can cause harm if they pass through a ruptured eardrum, while homemade mixtures and inappropriate products may irritate inflamed tissue or treat the wrong condition. This veterinarian advice article explains why the eardrum should be examined before ear medication is selected.

Do not aggressively flush a painful ear or assume that any over-the-counter cleanser is appropriate. Cleaning may eventually form part of the treatment, but the product and technique should fit the diagnosis, the amount of pain and swelling, and the condition of the eardrum.

Ask the clinic whether it wants you to clean the visible ear or leave it untouched before the appointment. If the veterinary team gives specific instructions, follow those rather than generic online advice.

Before the appointment, record:

• When the signs began
• Whether they started suddenly or gradually
• Which ear appears affected
• How often your dog scratches or shakes
• Whether the odor is new
• The amount, color, and texture of visible debris
• Any redness, swelling, sores, or blood
• Whether touch appears painful
• Recent swimming, bathing, or grooming
• Known allergies or current skin problems
• Previous ear episodes and treatments
• Current medications
• Appetite, energy, and general behavior
• Apparent hearing changes
• Head tilt, unusual eye movements, stumbling, or balance changes

These observations can help the veterinarian understand the pattern without requiring you to manipulate the canal or guess at the cause.

How a veterinarian confirms what is wrong

A veterinary visit generally begins with the history: when the signs started, which ear appears affected, whether the problem has happened before, and whether your dog has allergies, skin disease, recent water exposure, pain, hearing changes, or neurologic-looking signs.

The veterinarian then inspects the ear flap and visible opening. When it is safe and tolerable, an otoscope is used to look down the canal for inflammation, discharge, foreign material, parasites, or a mass and to assess the eardrum.

The next step is often ear cytology. The veterinarian collects a small sample of debris with a swab, transfers it to a slide, and examines it under a microscope. This can reveal yeast, bacteria, mites, inflammatory cells, or other material. Otoscopic examination and microscopic testing help separate conditions that can look similar from outside. MedVet describes this veterinary examination and testing process.

Pain or severe swelling may prevent a complete examination during the initial visit. The veterinarian will decide how to control discomfort and obtain the information needed without forcing an unsafe or traumatic examination.

The findings determine whether treatment should target:

• Bacteria
• Yeast
• Mites or another parasite
• Inflammation without current infection
• A foreign object
• Excess or compacted debris
• An allergy or skin disorder
• A polyp, mass, or other obstruction

Antibiotics are not appropriate for every ear problem. An antifungal will not eliminate mites, a mite treatment will not address allergic inflammation, and medication alone may not resolve a retained grass seed or obstructing mass.

Persistent, recurrent, chronic, or neurologically complicated cases may need additional investigation. Depending on the examination findings, a veterinarian may recommend culture, imaging, laboratory testing, assessment for allergies or systemic disease, or specialist evaluation.

Assessing the eardrum is also a medication-safety measure. A product that was suitable for a previous episode may be inappropriate now if the diagnosis or condition of the eardrum has changed.

Why ear problems recur and why follow-up matters

Repeated ear trouble should prompt investigation for an underlying contributor rather than the assumption that the ears simply need more frequent cleaning. Possible contributors include:

• Food or environmental allergies
• Moisture retained after swimming or bathing
• Floppy or heavy ear flaps
• Narrow canals
• Heavy hair within or around the canal
• Repeated trauma or inappropriate cleaning
• Retained foreign material
• Endocrine disease
• Immune-related skin disease
• Polyps or other masses
• Chronic changes within the ear canal

Anatomy and lifestyle can modify susceptibility; they do not establish a diagnosis. Floppy ears may reduce airflow, and frequent swimming may leave the canal damp, but upright-eared dogs that never swim can still develop ear disease. A swimming dog with floppy ears does not automatically have an infection whenever it scratches.

Repeated inflammation can alter the canal over time. Tissue may thicken, scar, or narrow, making ventilation, examination, cleaning, and medication more difficult. Vigorous shaking may also produce an aural hematoma. Unresolved or recurrent disease can be associated with ongoing pain, eardrum damage, hearing impairment, and balance complications. IDEXX summarizes these potential consequences of unresolved ear problems.

Complete medication exactly as prescribed and attend recommended rechecks, even if the smell, scratching, or discharge improves. Visible improvement shows that symptoms have eased; it does not prove that inflammation, organisms, or the underlying trigger has fully resolved. Holland Veterinary Hospital similarly advises completing treatment and attending follow-up because disease may remain after outward signs improve in its guide to canine ear infections.

Prevention should be individualized. Useful low-risk habits include:

• Looking at the visible part of the ears regularly
• Learning your dog’s usual wax amount and baseline smell
• Watching for changes after swimming, bathing, grooming, or allergy flares
• Keeping the ears dry
• Using only a veterinarian-recommended cleaner
• Following a cleaning schedule designed for your dog
• Addressing allergies or other underlying disorders as directed

Some dogs benefit from preventive cleaning; others become irritated by unnecessary or overly frequent cleaning. Ask your veterinarian whether your dog needs a cleanser, which product is suitable, how often to use it, and when cleaning should be paused.

Recovery time varies with the cause and severity. A straightforward outer-ear problem is different from chronic canal disease, a resistant infection, a foreign object, a mass, or middle- or inner-ear involvement. Avoid relying on a guaranteed recovery date. Contact the clinic if symptoms fail to improve as expected, return during treatment, or worsen.

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Can you tell a yeast infection from a bacterial ear infection by its smell or discharge?

No. Odor and discharge can show that the ear is abnormal, but they cannot reliably distinguish yeast from bacteria. Both can cause redness, itching, pain, unpleasant odor, and discharge in several colors or textures, and both can occur together.

A veterinarian can examine ear debris microscopically for yeast, bacteria, inflammatory cells, mites, and other material. Treatment should be based on the findings rather than an odor description or color chart.

Can ear mites look like an ear infection in a dog?

Yes. Ear mites and infections can both cause intense itching, scratching, head shaking, redness, sensitivity, odor, and debris. Dark, dry, coffee-ground-like material raises suspicion for mites—especially in a puppy or a dog exposed to an infested animal—but does not confirm them.

Dogs can also have mites and a secondary bacterial or yeast problem together. An otoscopic examination and microscopy can help distinguish them because mite treatments, antibiotics, and antifungal medications address different problems. Banfield explains this overlap and the need for veterinary identification.

Will a dog ear infection go away without treatment?

Do not assume that it will. Symptoms may fluctuate, but temporary improvement does not show that an infection or its underlying cause has resolved. Untreated disease may remain painful, become chronic, damage the canal or eardrum, or affect deeper structures.

Persistent or recurring scratching, head shaking, odor, redness, swelling, pain, or unusual debris warrants veterinary contact.

Should I clean my dog’s ear before the veterinary appointment?

Ask the clinic. It may want the ear left untouched until it can inspect the canal and sample the debris. Do not aggressively flush a painful ear or insert cotton buds or other objects into the canal.

Avoid peroxide, alcohol, vinegar mixtures, oils, human medication, leftover drops, and unconfirmed mite products unless a veterinarian specifically directs their use for the current episode.

When is a suspected dog ear infection an emergency?

Seek urgent assessment for head tilt with stumbling, circling, loss of balance, unusual eye movements, facial drooping, unequal blinking, difficulty standing, sudden hearing change, marked disorientation, or severe and escalating pain.

Rapid swelling, heavy or bloody discharge, marked lethargy, refusal to eat, or a swollen ear flap warrants prompt or same-day clinic contact, with urgency increasing if the sign is severe or accompanied by neurologic or balance changes.

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Key takeaway: You can recognize that an ear is abnormal by noticing persistent head shaking or scratching, odor, redness, swelling, pain, or unusual debris, but you cannot safely confirm the cause at home. Brief behavior that stops without other changes can be watched. Persistent local signs merit a veterinary appointment, while head tilt with balance loss, circling, unusual eye movements, facial changes, difficulty standing, sudden hearing change, or severe pain needs urgent assessment. Until the ear is examined, keep it dry, do not insert objects or unapproved products, and record the changes that will help the veterinarian diagnose and treat the problem.