Is your dog constantly scratching their ears or shaking their head, or do their ears smell unusual? Ear inflammation (otitis externa) is common in dogs. Without timely care, it can cause considerable discomfort and may become chronic, affect hearing or balance, or sometimes require surgery. This guide covers 5 essentials: recognising symptoms, understanding the possible causes, veterinary diagnosis, professional treatment, and daily care and prevention to help reduce recurring problems.
Warning Signs of Ear Inflammation: What Owners Should Watch For
Dogs cannot describe ear discomfort, so owners need to watch for physical and behavioural clues. Recognising symptoms and seeking veterinary care early can help prevent the condition from worsening and ensure ear drops or other medicines are used when appropriate. The following signs can help you identify a problem.
Behavioural Changes: Early Signs of Discomfort
Dogs express ear discomfort through various movements. These behaviours can be early indicators of ear inflammation.
Frequent, persistent head shaking
Dogs may shake their heads to relieve itching or pain inside the ear canal. An unusual increase in frequency, especially when persistent, may indicate an ear problem.
Vigorous scratching with the hind paws or rubbing the ears against furniture and walls
Dogs may scratch their ears hard with a hind paw or rub them on the floor, carpet, furniture or walls to relieve intense itching. These actions can damage the skin around the ear flap.
An unusual increase in scratching, such as more than 20 times daily
Observe how often your dog normally scratches their ears. A marked increase, for example more than 20 times a day, is a reason for concern and may suggest significant irritation; the overall change matters more than a fixed threshold.
Changes in Ear Appearance and Discharge
Alongside behaviour, inspect the ears themselves for changes in appearance and discharge.
Redness, swelling and warmth in the ear canal or ear flap
A healthy ear canal is generally pale pink and should not feel unusually hot. Obvious redness, swelling or warmth in the canal or ear flap may indicate inflammation.
Excess wax or changes in discharge, including dark brown, black coffee-ground-like or yellow-green material
Excessive wax or a change in its colour or texture needs attention. Dark brown or black, coffee-ground-like debris can occur with ear mites or yeast overgrowth. Yellow-green, pus-like discharge may suggest bacterial infection.
Unpleasant Odour: A Possible Sign of Infection
An unusual smell from the ear canal can be a strong clue to infection.
From a mild unusual smell to a strong rotten or sweet odour
A slight natural smell can be normal. However, a rotten, sour or unusually sweet smell may indicate an overgrowth of bacteria or yeast in the ear canal.
Sensitivity to Touch and Signs of Pain
A dog with painful ears may resist handling or even react aggressively.
Pulling away, crying or reacting aggressively when the ears are touched
If your dog ducks, pulls away, cries or shows uncharacteristic aggression when you touch their ears, they may be in considerable pain. This can indicate more severe inflammation.
Wider Health Effects: Signs the Condition Is Worsening
Worsening ear inflammation or infection may affect your dog's general wellbeing.
Lethargy and reduced appetite
Severe ear discomfort can make a dog feel unwell and eat less. They may seem subdued, become less active or lose interest in playing.
Head tilt, hearing loss or poor balance in severe cases
Inflammation spreading to the middle or inner ear may affect hearing and balance. A tilted head, noticeable hearing loss or an unsteady gait can signal a serious ear condition involving the balance or nervous system and requires prompt veterinary attention.
Why Does Your Dog Keep Getting Ear Inflammation?
Recurring ear problems are a common concern for owners. Several factors can contribute, and understanding them helps explain why inflammation keeps returning.
Ear Anatomy and Breed Predisposition
The L-shaped ear canal can trap dirt and moisture
Unlike the human ear canal, a dog's has an L-shaped bend. This offers some protection to the sensitive eardrum but also limits ventilation. Dirt, wax and moisture can collect deeper inside, creating warm, damp conditions that favour bacteria and yeast.
Floppy-eared breeds, such as Cocker Spaniels and Golden Retrievers, may be more susceptible
Breeds such as Cocker Spaniels, Golden Retrievers and Poodles have ear flaps that cover the canal opening. This further restricts airflow and retains heat and moisture, increasing susceptibility to recurring inflammation or infection.
External Factors and Environmental Irritants
Moisture left after bathing or swimming
Bathing and swimming are common activities, but moisture remaining in the ears can encourage bacterial and fungal growth. Persistent dampness is a frequent contributing factor in ear inflammation.
Foreign objects, such as grass awns and grit, and parasites such as ear mites
Outdoor play can allow small objects, including grass awns, dust or insects, into the ear canal. These irritate its lining and may trigger inflammation. Ear mites can also cause severe itching and inflammation as they live and reproduce in the canal.
Incorrect or excessive cleaning can irritate or injure the ear
Ear hygiene matters, but pushing cotton buds deep into the canal or cleaning too frequently can cause irritation and small injuries. Damage to the natural protective barrier makes microbial overgrowth more likely and may lead to inflammation requiring prescribed ear drops or other medication.
Underlying Conditions and Allergies
Food or environmental allergies can cause ear inflammation
Ear problems are not always caused by external factors alone. Reactions to food ingredients, pollen, dust mites or other allergens can cause itching and chronic ear inflammation, making infection more likely.
Systemic conditions, including hypothyroidism and autoimmune disease
Underlying illnesses such as hypothyroidism or autoimmune disease may affect ear health by altering immune function or weakening the skin barrier. This can make recurring infection or inflammation more likely.
Skin conditions such as seborrhoeic dermatitis can affect the ears
Skin problems elsewhere on the body may extend to the ears. Seborrhoeic dermatitis, for example, affects oil production and can leave the canal greasy, favouring microbial growth and aggravating inflammation.
Veterinary Diagnosis: Finding the Cause and Choosing Treatment
If your dog shows signs of ear inflammation, a veterinary examination is the first step. A series of assessments can identify the underlying cause and guide appropriate treatment. Each part of the investigation contributes useful information.
A Full Examination and Initial Assessment
The veterinarian begins with an examination to gather information and assess the ears' overall condition.
Visual inspection and gentle examination by touch
The veterinarian checks the ear flaps for redness, swelling, injury, discharge and odour. They then gently feel around the ear base and canal for heat or swelling and observe your dog's response for signs of pain. This helps establish the extent and severity of inflammation.
Examining the deeper ear canal with an otoscope or video otoscope
The deeper canal cannot be assessed fully by looking at the outside alone. An illuminated ear examination instrument lets the veterinarian inspect the canal lining, look for foreign objects such as grass awns or wax plugs, assess the eardrum and examine the amount and nature of discharge.
Laboratory Tests to Identify the Cause
If infection is suspected, laboratory testing can help identify bacteria, yeast or parasites involved in the inflammation.
Microscopic examination of ear discharge for bacteria, yeast and parasites
The veterinarian gently collects discharge with a swab and examines a sample on a microscope slide. This can reveal bacteria, budding yeast such as Malassezia, or parasites such as ear mites. These findings help guide the choice of ear drops or other medication.
Bacterial culture and sensitivity testing to guide antibiotic choice
For recurring cases or poor responses to standard treatment, the veterinarian may recommend bacterial culture and sensitivity testing. Bacteria from the sample are grown and tested against antibiotics to help identify effective treatment and avoid unnecessary or poorly targeted antibiotic use.
Checking for Underlying Systemic Disease
Ear inflammation can sometimes reflect a wider health problem. Further investigations may therefore be needed.
Blood tests and other investigations for thyroid disease, allergies and other causes
If a wider illness is suspected, blood tests may help assess general health, inflammation and thyroid function. Hypothyroidism can affect the skin and coat and contribute to ear problems. Where chronic inflammation appears allergy-related, the veterinarian may recommend a structured allergy investigation, including appropriate testing or a dietary trial, to identify environmental or food triggers. Identifying the cause is essential for a long-term management plan.
Professional Treatment: From Medication to Surgery
Following diagnosis, professional treatment helps restore comfort and health. Your veterinarian will tailor a plan to control inflammation and address its cause, from cleaning and medication to surgery in selected cases.
Professional Ear Cleaning and Preparation
Effective treatment often begins with careful preparation. Professional ear cleaning can create better conditions for medication to work.
Deep cleaning by a veterinarian to remove accumulated material
Using appropriate equipment and techniques, the veterinarian removes excess wax, discharge and foreign material. This reduces debris that supports bacterial or yeast growth and allows prescribed ear medication to reach the affected tissue more effectively.
Medication Options
After cleaning, the veterinarian chooses medication according to the cause. Treatment may involve topical drops, oral medication or a combination when indicated.
Oral antibiotics, antifungals or anti-inflammatory medicines
For certain bacterial or fungal infections, the veterinarian may prescribe oral antibiotics or antifungals to act throughout the body. Significant redness, swelling or pain may also require an oral anti-inflammatory medicine. The choice depends on the infection's location and severity.
Topical ear drops act directly at the affected site
Prescription ear drops are commonly used for canine ear inflammation. Depending on the diagnosis, they may contain an antibiotic, antifungal or corticosteroid. They act locally to control microbial growth and reduce inflammation and are often central to treatment.
Complex Cases and Surgery
Medication alone may not be enough for some persistent or complicated cases. The veterinarian will assess whether further procedures or surgery are appropriate.
Chronic or resistant disease may require surgery, including ear canal removal
For chronic, recurring disease that responds poorly to medication, surgery may be considered. Total Ear Canal Ablation (TECA), for example, is an option for severely damaged ears whose canals can no longer be adequately ventilated or cleaned. Removing diseased tissue can relieve persistent pain and improve quality of life, although suitability and expected outcomes need individual assessment.
Home Care and Prevention: Reducing Recurrence
If your dog has experienced ear inflammation, ongoing preventive care matters. After treatment, the next step is to maintain ear health in daily life and reduce recurrence, helping your dog remain comfortable.
Correct Routine Ear Cleaning
Appropriate routine cleaning can help manage wax and moisture, both of which may contribute to ear problems.
Use a veterinarian-recommended ear cleaner at the advised frequency
Choose a product recommended by your veterinarian for your dog's ears. Suitable formulas can loosen wax without unnecessarily irritating the sensitive canal. Using an inappropriate product may worsen irritation or inflammation.
Cleaning technique: apply, massage and wipe the outer ear
Gently lift the ear flap and slowly apply the recommended amount of cleaner into the canal. Massage the ear base gently between your thumb and forefinger for around fifteen to twenty seconds to mix the cleaner with wax and debris. Let your dog shake out the excess, then wipe visible material from the ear flap and canal entrance with a clean cotton ball or soft tissue.
Avoid cotton buds inside the canal
Never push cotton buds deep into a dog's ear. The L-shaped canal makes deep cleaning difficult, and a bud may push debris further in or injure the canal wall or eardrum. Clean only the visible outer areas and leave deeper cleaning to a veterinarian.
Keeping Out Excess Moisture and Foreign Objects
Moisture and foreign material are common contributors to ear inflammation. Attentive daily care can reduce these risks.
Dry the ears carefully after bathing or swimming
Water left in the ears creates warm, damp conditions that favour bacteria and yeast. After bathing or swimming, gently dry the ear flaps with a soft towel. If using a dryer, choose a low temperature, keep it at a suitable distance and dry the surrounding hair gently; do not direct hot or forceful air deep into the canal.
Check ears regularly and arrange removal of foreign objects or trimming when needed
Make ear checks a habit, ideally once a week. Look for redness, odour, discharge, grass seeds, grit and dense hair around the opening. Suspected foreign objects should be removed by a veterinarian. For some hairy breeds, appropriate trimming around the entrance can improve ventilation and reduce moisture retention.
Diet and Environmental Management
Diet and living conditions affect overall health, including the ears. Addressing these factors may help reduce recurring inflammation.
Consider a suitable hypoallergenic diet and probiotics when allergies are involved
If the veterinarian identifies an allergy-related problem, dietary management may be important. A suitable hypoallergenic diet can help avoid identified food triggers. Probiotics may be considered under veterinary guidance to support gut health, although their effect on allergic ear inflammation is not assured.
Reduce indoor allergens and keep the home clean
Dust mites, pollen and mould spores can trigger allergic responses. Regular vacuuming, wiping furniture, washing pet bedding and maintaining ventilation can reduce allergen build-up. A clean environment with fewer relevant allergens may support long-term ear health and reduce flare-ups.