Everything You Need to Know About Ear Hematomas in Dogs

As a dog owner, it can be alarming to suddenly notice a large, soft swelling on your dog‘s ear seemingly appear out of nowhere. While many people assume this "bubble" is an air pocket, in most cases the swelling is actually filled with fluid, typically blood and inflammatory cells. This is known as an ear hematoma or aural hematoma.

Ear hematomas can affect any breed of dog at any age, but they are more commonly seen in dogs with long, floppy ears such as Basset Hounds, Beagles, and Cocker Spaniels. However, any dog can develop an ear hematoma under the right circumstances.

In this comprehensive guide, we‘ll take an in-depth look at ear hematomas in dogs including the signs to watch for, underlying causes, treatment options, and ways to prevent recurrence. Armed with this knowledge, you‘ll know exactly what to do if you ever notice that telltale "pillow ear" on your own pup. Let‘s get started!

The Anatomy of Your Dog‘s Ear

To understand how ear hematomas form, it‘s helpful to have a basic understanding of your dog‘s ear anatomy. The visible portion of your dog‘s ear is called the pinna. It is made up of a thin layer of skin and delicate tissue covering an inner layer of cartilage which gives the ear its shape.

Between the skin and cartilage is a layer of blood vessels. Normally, these vessels provide blood supply and nutrients to the ear tissues. However, when trauma occurs such as from aggressive head shaking or scratching, these vessels can rupture, allowing blood and fluid to fill the space between the tissue layers.

This pooled fluid is what causes the pinna to swell and take on that distinctive pillow-like appearance. The swelling may encompass a small area or the entire ear flap depending on severity. If left untreated, scar tissue will form as the body attempts to reabsorb the fluid. This can lead to permanent disfigurement of the ear known as "cauliflower ear."

What Causes Ear Hematomas?

Anything that causes your dog to traumatize their own ears can potentially lead to the development of a hematoma. By far the most common culprits are underlying ear conditions that trigger intense itching, pain, and inflammation. These include:

Ear Infections: Bacterial and yeast infections are extremely common, especially in dogs with floppy ears, excessive hair in the ear canal, or a history of allergies. The dark, warm, moist environment of the ear canal provides the ideal breeding ground for microbes if the ears are not kept clean and dry.

Foreign Bodies: Grass awns, foxtails, and other plant material can become lodged in the ear canal during outdoor activity. These foreign bodies are intensely irritating and can be very difficult for a dog to dislodge on their own.

Allergies: Inhalant allergies to triggers like pollen, dust, and mold can cause inflammation of the skin inside the ears. Food sensitivities and flea bite hypersensitivity may also lead to itchy ears in some dogs.

Ear Mites: Microscopic mites such as Otodectes cynotis can infest the ears causing severe itching. A swelling following a bath or swimming – make sure to thoroughly dry your dog‘s ears after water exposure.

Polyps or Tumors: Though less common, growths inside the ear canal can also trigger irritation and inflammation.

Regardless of the underlying cause, the itching and discomfort leads to aggressive head shaking and scratching at the ears. A hematoma can then form in a matter of hours from the repeated self-trauma. Even if the initial itching subsides, once a hematoma starts a vicious cycle occurs – the more the ear swells, the more painful and pruritic it becomes, so the dog scratches more, further worsening the fluid build-up.

Signs of an Ear Hematoma

Ear hematomas are usually first noticed by their appearance – a soft, fluid-filled swelling on one or both ears. The swelling may feel warm to the touch and squishy, much like a water balloon. Your dog will likely resist having the ear handled as the pressure can be quite painful.

In the hours or days leading up to the development of a hematoma, you may notice your dog showing other signs of ear irritation such as:

• Frequent head shaking
• Scratching or rubbing at the ears
• Whining or crying, especially when scratching
• Holding the ears flat against the head
• Ear redness and discharge
• Foul odor from the ears
• Sensitivity to touch around the head and ears

If you notice any of these signs, it‘s important to have your dog evaluated by a veterinarian as soon as possible, even if a hematoma has not yet formed. Prompt treatment of the underlying cause can prevent a hematoma from developing in the first place.

Diagnosis and Treatment

Your veterinarian will start with a thorough examination of the ears, both visually and with an otoscope to look deep into the ear canals. They will likely take samples of any discharge or debris to examine under the microscope for signs of bacteria, yeast, or mites.

If a foreign body is suspected, sedation may be necessary to retrieve it with forceps or flush it out. Severe infections may require culture and sensitivity testing to select the most effective antibiotic. If the hematoma is very painful, your vet may also recommend blood testing and imaging to rule out a tumor or other growth.

Treatment involves addressing both the hematoma itself and the underlying cause:

Treating the Underlying Cause: Bacterial infections are typically treated with topical and/or oral antibiotics for 2-4 weeks. Yeast overgrowth responds well to antifungal medications. Ear mites are eliminated with anti-parasitic medications. Allergies may be managed with antihistamines, steroids, immunotherapy, or hypoallergenic diets. Foreign material should be gently flushed out or surgically extracted.

Hematoma Treatment: The goals with hematoma treatment are to remove the fluid, prevent re-accumulation, and allow the ear tissues to heal with minimal scarring:

• For small hematomas, your vet may attempt to drain the fluid with a needle and syringe. A steroid injection into the area can help prevent re-filling. However, this conservative approach does carry a higher risk of recurrence.

• Surgical treatment involves making an incision to fully drain and flush out the hematoma. The outer ear skin is then tacked down to the cartilage with either sutures or special buttons/tubes to reduce "dead space" and encourage scar tissue formation between the layers. Drains may be placed to prevent fluid re-accumulation.

• Cold compresses and oral pain medications can help reduce discomfort and inflammation post-operatively.

• Strict rest is essential during the healing process – your dog should wear an e-collar or clothing to prevent further injury to the delicate ear tissues and sutures. Sutures or drains are typically removed after 14-21 days.

• Prognosis for a full cosmetic recovery is better with prompt surgical intervention, as this minimizes the amount of scarring and potential ear deformity. Even with surgery, some dogs will always have a slightly thickened, crinkled ear.

Preventing Ear Hematomas

Sadly, once a dog develops an ear hematoma, they may be at increased risk of recurrence in the future, especially if there is an untreated underlying cause. However, there are plenty of steps owners can take to reduce the risk of hematomas developing in the first place:

• Use an ear cleaner recommended by your vet to gently wipe away dirt and wax on a weekly basis, especially if your dog swims or bathes frequently. Always dry the ears thoroughly afterwards.

• If your dog has a lot of hair in the ear canals, consider carefully trimming or plucking this hair to increase air flow.

• Address any signs of ear infection, allergies, or irritation promptly with your vet – don‘t wait for a hematoma to form! Even if your dog‘s ears seem normal, have them checked at every wellness exam.

• Use an e-collar or clothing to deter scratching if you notice your dog frequently traumatizing their ears. Frequent head shaking should also be investigated.

• Be diligent about flea and tick prevention to minimize inhalant allergies and flea allergy dermatitis which commonly affect the ears.

• If your dog is prone to ear infections, consider a supplement like EpiOtic Advanced Ear Cleanser which can help restore the natural balance in the ear canal.

When to See the Vet

If you notice any signs of ear irritation, swelling, or discomfort in your dog, seek veterinary care right away. Delaying treatment allows more fluid to accumulate and increases the risk of permanent scarring and deformity of the ear. It is also inhumane to allow a dog to suffer with the pain and intense itching of an ear infection or foreign body.

In some cases, an untreated ear infection can progress to a deeper infection of the middle or inner ear. These more serious infections can lead to neurologic symptoms like a head tilt, loss of balance, circling, and rapid eye movement. Rarely, a severe inner ear infection can lead to deafness, meningitis, or other life-threatening complications. Play it safe and have any ear issues evaluated promptly!

The Bottom Line

An ear hematoma may seem like a strange and scary condition for dog owners to suddenly contend with. However, with prompt treatment and a little extra TLC, the vast majority of dogs recover fully. Staying vigilant for early signs of ear problems is the best way to prevent a hematoma from developing in the first place and catching them quickly is key to a good cosmetic outcome.

No one wants to see their dog suffer with painful, swollen ears. If you notice a puffy earflap or your pup can‘t stop scratching, don‘t wait – get them to the vet for a thorough ear exam. Your veterinarian can determine the underlying cause and start treatment right away. Before you know it, your dog will be back to feeling like their ear-resistible self!