How to Tell If Dog Has Ear Infection: 7 Warning Signs
If your dog is scratching at their ears, shaking their head repeatedly, or showing redness around the ear canal, they likely have an ear infection. Ear infections in dogs are among the most common health issues veterinarians see, with nearly 16% of dogs diagnosed with them each year.
This guide is for dog owners who want to recognize the early signs of ear infections, understand their causes, and know when professional care is needed. You'll learn the seven most reliable warning signs, what triggers infections, and how to support your dog's recovery with both veterinary treatment and wellness support.
- The seven most common signs of ear infections in dogs
- When ear symptoms require immediate veterinary attention
- What causes ear infections and which dogs are most at risk
- How veterinarians diagnose and treat ear infections
- Natural ways to support ear health and reduce infection risk
What Are the Most Common Signs of an Ear Infection?
The most common signs of an ear infection are persistent scratching at the ear or face, repeated head shaking, ear rubbing against furniture or the ground, redness or swelling around the ear canal, foul odor, and abnormal discharge. Dogs with ear infections also often show pain when you touch the affected ear.
These symptoms appear because inflammation in the ear canal causes discomfort and irritation. Your dog's natural response is to try to relieve that discomfort through scratching, shaking, or rubbing. The discharge and odor result from bacteria, yeast, or other pathogens multiplying in the warm, moist environment of the infected ear.
Sign 1: Persistent Scratching or Pawing at the Ear
Dogs with ear infections scratch at their ears more frequently and intensely than normal grooming behavior. You might notice your dog repeatedly using their back paw to scratch the same ear, or pawing at the side of their face with their front paw.
This scratching can become so intense that it causes hair loss around the ear or face, and in severe cases, dogs may scratch hard enough to create open wounds. The scratching often worsens at night or when your dog is resting, as they become more aware of the discomfort in the absence of other distractions.
Sign 2: Repeated Head Shaking or Tilting
Head shaking is one of the earliest behavioral changes you'll see. Your dog may shake their head vigorously and frequently, sometimes immediately after scratching. A head tilt, where your dog holds their head at an angle with one ear lower than the other, suggests the infection may be affecting their sense of balance or causing significant pain on one side.
In 2026 veterinary guidance, persistent head tilting is highlighted as a red flag that requires urgent evaluation. When combined with balance problems or walking in circles, a head tilt can indicate the infection has spread to the middle or inner ear.
Sign 3: Redness, Swelling, or Inflammation
Visible redness inside the ear flap or around the opening of the ear canal is a clear sign of inflammation. The skin may appear pink to bright red, and you might notice swelling that makes the ear canal look narrower than usual.
In more advanced cases, the entire ear flap can become swollen and warm to the touch. Rapid swelling or swelling that extends to the face is considered an emergency sign. Some dogs develop crusty or scabbed skin around the ear from chronic inflammation.
Sign 4: Unusual Discharge from the Ear
Healthy dog ears produce small amounts of light-colored wax. Infected ears produce abnormal discharge that varies in color, consistency, and amount depending on the cause. Yellow or green discharge often indicates a bacterial infection, while dark brown or black discharge suggests yeast overgrowth.
Bloody discharge or pus signals a more severe infection that needs immediate veterinary attention. The discharge may be thick and sticky, or thin and watery. You might notice it on your dog's bedding, on furniture where they rest their head, or dried around the outer ear.
Sign 5: Foul Odor Coming from the Ear
A strong, unpleasant smell coming from your dog's ear is one of the most distinctive signs of infection. The odor is often described as yeasty, musty, or sour, and it becomes more noticeable as the infection worsens.
This smell results from bacteria or yeast multiplying in the ear canal. Even after bathing your dog, the odor typically returns quickly if an infection is present. If you notice an ear odor along with any other symptoms on this list, schedule a veterinary appointment.
Sign 6: Pain or Sensitivity When Ear Is Touched
Dogs with ear infections often pull away, whine, or show signs of distress when you touch or examine their ears. Some dogs become uncharacteristically irritable or snappy when their ears are handled, even if they're normally gentle.
You might notice your dog avoiding being petted on the head or turning away when you reach toward their ears. In severe cases, dogs may cry out or yelp when their ears are barely touched. This pain response indicates significant inflammation in the ear canal.
Sign 7: Behavioral Changes Like Lethargy or Loss of Appetite
Advanced ear infections can cause systemic symptoms beyond the ear itself. Dogs may become lethargic, lose interest in food, or seem generally unwell. Some dogs develop a fever, vomit, or show a reduced appetite as the infection progresses.
Behavioral changes also include irritability, distress, whining, or avoidance of normal activities. Recent veterinary guidance emphasizes that these behavioral shifts often appear before obvious physical ear changes, especially in dogs with high pain tolerance. If your normally active dog seems withdrawn or uncomfortable, check their ears carefully.
When Does an Ear Infection Require Emergency Care?
Seek immediate veterinary care if your dog shows sudden hearing loss, facial swelling, neurologic signs such as unusual eye movements or loss of coordination, severe pain, or stops eating and drinking. These symptoms suggest the infection may be spreading beyond the outer ear canal.
Other emergency signs include a head tilt combined with balance problems, walking in circles, vomiting, or collapse. According to 2026 veterinary clinic guidance, symptoms can escalate quickly when moisture becomes trapped in the ear, particularly during hot, humid weather. Do not wait for a regular appointment if you observe any of these red flags.
What Causes Ear Infections in Dogs?
Ear infections in dogs typically result from bacteria, yeast, or a combination of both taking hold in the ear canal. However, these infections rarely develop without an underlying cause. Allergies are one of the most common triggers, causing inflammation that creates an environment where pathogens can thrive.
Other common causes include moisture trapped in the ear after swimming or bathing, ear mites, foreign objects such as grass seeds, excessive earwax buildup, and anatomical factors such as narrow ear canals or heavy ear flaps. Dogs with floppy ears, such as Cocker Spaniels and Basset Hounds, are at higher risk because their ear structure limits airflow.
Otitis externa, or outer ear infection, is the most common type and has increased 9.4% in dogs since 2006. Some dogs develop chronic ear infections due to underlying conditions like hypothyroidism or autoimmune disorders that compromise their immune response.
How Do Veterinarians Diagnose Ear Infections?
Your veterinarian will start with a physical examination of your dog's ears, looking for redness, swelling, discharge, and odor. They'll use an otoscope to examine the ear canal and eardrum, checking for foreign objects, masses, or signs of a ruptured eardrum.
The diagnostic process typically includes taking a sample of the ear discharge for microscopic examination. This cytology helps determine whether bacteria, yeast, or both are present, guiding treatment decisions. In chronic or complicated cases, your vet may recommend bacterial culture and sensitivity testing to identify the specific organisms and determine which medications will be most effective.
Some dogs require sedation for a thorough ear examination, especially if the ears are extremely painful or if the ear canal is too swollen to examine while awake. Imaging, such as X-rays or CT scans, may be necessary if your vet suspects the infection has spread to the middle or inner ear.
What Treatment Do Dogs Need for Ear Infections?
Treatment for ear infections typically involves ear cleaning with a veterinary-approved cleanser followed by topical medications applied directly into the ear canal. These medications usually contain a combination of antibiotics to fight bacteria, antifungals to address yeast, and anti-inflammatory drugs to reduce swelling and pain.
Your veterinarian will show you how to properly clean your dog's ears and apply the medicine at home. Treatment duration typically ranges from one to three weeks, depending on severity. Do not use over-the-counter ear cleaners or medications without veterinary guidance, as some products can damage the ear if the eardrum is ruptured.
For severe or chronic infections, your vet may prescribe oral antibiotics or antifungal medications in addition to topical treatment. Pain medicine may be recommended if your dog is showing significant discomfort. Follow-up appointments are important to confirm the infection has cleared and to address any underlying causes.
How Can You Support Your Dog's Ear Health Naturally?
Supporting your dog's overall wellness can reduce their susceptibility to ear infections. A strong immune system helps your dog fight off pathogens before they establish an infection. At Asher House Wellness, our probiotic chews support digestive and immune health, which play a role in how well your dog's body responds to inflammatory and infectious triggers.
For dogs whose ear infections are linked to anxiety or stress, which can weaken immune function, our CBD products may help promote calm and emotional balance. Many dogs experience fewer recurring infections when their stress levels are better managed, and their bodies are supported with quality supplements.
Regular ear cleaning with a vet-approved cleanser is one of the most effective prevention strategies, especially for dogs prone to infections. Dry your dog's ears thoroughly after swimming or bathing. Keep ear hair trimmed if your groomer or vet recommends it. Address allergies promptly, as they're a leading cause of chronic ear inflammation.
Which Dogs Are Most at Risk for Ear Infections?
Dogs with floppy ears, narrow ear canals, or heavy ear flaps face higher risk because these anatomical features restrict airflow and trap moisture. Breeds including Cocker Spaniels, Basset Hounds, Labrador Retrievers, Golden Retrievers, and Poodles are commonly affected.
Dogs with allergies, whether environmental or food-related, develop ear infections more frequently. Pets that swim regularly or live in humid climates also face an elevated risk due to increased moisture exposure. Senior dogs and those with compromised immune systems from conditions like diabetes or hypothyroidism are more vulnerable to infections.
Can Ear Infections Spread or Cause Complications?
Untreated ear infections can spread from the outer ear canal to the middle ear and eventually the inner ear. Middle ear infections can cause balance problems, facial nerve damage, and hearing loss. Inner ear infections may result in permanent hearing damage or neurologic symptoms.
Chronic ear infections can lead to permanent changes in the ear canal, including thickening of the canal walls and scar tissue formation, which make future infections more likely and harder to treat. Some dogs develop ear hematomas, where blood accumulates between the skin and cartilage of the ear flap, usually from vigorous head shaking. This requires surgical drainage.
How Long Does It Take for an Ear Infection to Heal?
Most uncomplicated ear infections improve within one to two weeks with proper treatment. You should notice reduced scratching, less discharge, and decreased odor within the first few days of starting medicine. Complete resolution typically takes two to three weeks.
Chronic or severe infections may require longer treatment periods, sometimes extending to several weeks or months. Your vet will schedule follow-up appointments to monitor progress and may take additional ear samples to confirm the infection has cleared. Stopping treatment too early, even if symptoms improve, can allow the infection to return stronger.
Frequently Asked Questions
Can I treat my dog's ear infection at home without seeing a vet?
No, you should not attempt to treat an ear infection without veterinary diagnosis. What looks like a simple infection may have an underlying cause that requires specific treatment. Using the wrong medicine or cleaning solution can worsen the problem or damage your dog's ear if the eardrum is ruptured. Your vet needs to identify the specific cause to prescribe the right treatment.
Are ear infections contagious between dogs?
Ear infections themselves are not typically contagious, but ear mites, which can cause infections, can spread between pets. Most ear infections result from bacteria or yeast that naturally live on your dog's skin but overgrow when conditions in the ear change. If one dog in your home has recurring infections, check whether environmental factors or allergens might be affecting multiple pets.
How can I prevent my dog from getting ear infections?
Keep your dog's ears clean and dry, especially after swimming or bathing. Use a vet-approved ear cleanser as recommended by your veterinarian. Address allergies promptly with your vet's guidance. Support your dog's immune system with quality nutrition and supplements. Avoid letting water enter the ear canals during baths, and trim ear hair if your vet or groomer recommends it for your dog's breed.
Why does my dog keep getting ear infections?
Recurring ear infections usually indicate an underlying problem that hasn't been addressed. Common causes include untreated allergies, anatomical factors such as narrow ear canals, incomplete treatment of prior infections, or systemic conditions affecting immune function. Your vet may recommend allergy testing, dietary changes, or long-term management strategies to break the cycle of recurring infections.
Can ear infections cause permanent damage?
Yes, chronic or untreated ear infections can cause permanent hearing loss, scarring of the ear canal, and changes to the ear structure that make future infections more likely. Infections that spread to the middle or inner ear can damage the nerves responsible for balance and facial movement. This is why early treatment and complete resolution of infections are so important.
Take Action When You Notice the Signs
Ear infections cause real discomfort for your dog, but early recognition and proper treatment lead to a quick recovery in most cases. Watch for the seven key signs: persistent scratching, head shaking or tilting, redness and swelling, unusual discharge, foul odor, pain when touched, and behavioral changes like lethargy.
Schedule a veterinary appointment as soon as you notice symptoms. While your vet addresses the infection with appropriate medications, you can support your dog's overall wellness with quality supplements that strengthen immune function and promote emotional balance. At Asher House Wellness, we create science-informed supplements designed to help your dog thrive physically and emotionally. Our probiotic chews and CBD products complement veterinary care by supporting the foundational health that helps your dog stay resilient. Explore our full range of wellness solutions and give your dog the support they deserve.
