Understanding Aural Hematomas in Pets: Causes, Treatments, and How to Prevent Them

What is an Aural Hematoma?

An aural hematoma is a blood-filled swelling that develops between the skin and cartilage of a pet’s ear flap. This condition is more common in dogs but can also affect cats. It often appears as a soft, fluid-filled lump on the ear, making it puffy and uncomfortable for your pet. While not life-threatening, an aural hematoma can cause significant discomfort and may indicate an underlying issue that needs attention.

Causes of Aural Hematomas

1. Ear Scratching and Head Shaking

Aural hematomas are often caused by excessive scratching or head shaking, usually due to:

  • Ear infections
  • Parasites like ear mites
  • Allergies causing itchy skin
  • Foreign objects stuck in the ear

2. Trauma and Injury

Blunt trauma, such as rough play, fights with other animals, or accidental bumps, can lead to blood vessel rupture inside the ear flap, causing a hematoma.

3. Underlying Health Conditions

  • Blood clotting disorders: Some pets have clotting issues that make them more prone to hematomas.
  • Autoimmune diseases: These can cause inflammation and weaken blood vessels.

Signs and Symptoms to Watch For

1. Swollen, Puffy Ear Flap

A hematoma usually presents as a soft, warm swelling on one ear. The ear may feel fluid-filled and may change in size over time. In some cases, the swelling can become firm if left untreated, leading to permanent changes in the ear’s shape.

2. Pain and Discomfort

Your pet may react negatively when their ear is touched, showing signs of pain or irritation. This can result in whining, whimpering, or avoidance behaviors when you try to examine their ear. Some pets may also become less active or withdrawn due to the persistent discomfort.

3. Frequent Shaking and Scratching

Even after the hematoma develops, pets may continue to shake their head or scratch due to discomfort. This behavior can worsen the condition by causing additional trauma to the ear, leading to more swelling and potential infection. Excessive scratching can also create open wounds, increasing the risk of secondary infections.

4. Ear Holding or Drooping

If the hematoma is large, your pet might hold their ear at an awkward angle or seem unable to lift it properly. The weight of the swelling can make the ear feel heavy, causing it to droop unnaturally.

Treatment Options for Aural Hematomas

1. Drainage Procedure

Your vet may use a needle to drain the fluid from the hematoma. While this provides temporary relief, the fluid often refills, requiring additional treatment.

This is a minimally invasive approach that provides immediate relief by reducing pressure and discomfort. However, because the underlying issue remains unaddressed, the fluid often refills within a few days, requiring additional treatments or further intervention.

2. Surgical Intervention

Surgery is the most effective way to treat an aural hematoma, especially for larger or recurrent cases. This involves:

  • Making an incision to drain the fluid, ensuring complete evacuation of the hematoma.
  • Suturing the ear flap in a way that prevents fluid buildup while maintaining proper blood circulation.
  • Bandaging the ear to support healing and minimize post-surgical swelling.

Surgery helps reduce recurrence and improves healing by allowing the skin and cartilage to reattach properly.

3. Medications and Supportive Care

Your vet may prescribe medications to help manage symptoms and aid in recovery. These may include:

  • Antibiotics if there is an existing infection or if drainage or surgery was performed to prevent secondary infections.
  • Anti-inflammatory drugs to reduce swelling and discomfort, helping your pet heal faster.
  • Pain relievers to keep your pet comfortable and prevent excessive scratching or head shaking that could worsen the condition.

In addition to medication, your vet may recommend cold compresses or specialized ear wraps to provide further relief and support the healing process.

4. Addressing Underlying Causes

Treating the root cause—whether it’s an infection, allergies, or parasites—is essential to prevent recurrence. Without addressing the initial trigger, your pet may develop repeated hematomas, leading to long-term ear issues. Your vet may recommend:

  • Ear cleaning solutions to remove wax buildup and debris that could contribute to irritation.
  • Allergy management plans such as hypoallergenic diets or medications to control itching and inflammation.
  • Flea and tick preventatives to eliminate external parasites that can cause excessive scratching and discomfort.

By tackling the underlying issue, pet owners can reduce the risk of future hematomas and improve their pet’s overall ear health.

How to Prevent Aural Hematomas

1. Regular Ear Care and Cleaning

Routine ear cleaning with vet-approved solutions can help prevent infections and debris buildup. Cleaning your pet’s ears at least once a week can remove wax and dirt that might lead to irritation. Your vet may recommend specific solutions or techniques to ensure proper cleaning without causing additional discomfort.

2. Monitor for Ear Infections and Allergies

If your pet has recurring ear infections or allergies, working with your vet to manage these issues can reduce head shaking and scratching. Regular check-ups can help identify early signs of inflammation, redness, or excessive wax buildup. Additionally, adjusting your pet’s diet or environment to minimize allergens can help prevent ear-related issues from recurring.

3. Parasite Prevention

Use flea and tick preventatives to reduce the risk of ear mites and other parasites that cause ear irritation. These tiny pests can lead to intense itching, causing your pet to scratch their ears excessively, increasing the risk of hematomas. Keeping up with monthly flea and tick treatments, along with regular ear inspections, can help catch infestations early before they become a bigger problem.

4. Avoid Rough Play That Might Cause Trauma

If your pet is prone to injuries, monitoring their playtime and avoiding rough interactions with other pets can help prevent ear trauma. Ensuring a safe play environment and intervening when play becomes too rough can minimize the risk of ear-related injuries.

When to See a Vet

If you notice swelling in your pet’s ear, don’t wait for it to resolve on its own. Without treatment, hematomas can harden, leading to permanent ear deformities (cauliflower ear). Seek veterinary care as soon as possible to relieve your pet’s discomfort and address any underlying issues.

If your pets are in an emergency or if you have general inquiries, please do not hesitate to contact Veterinary Emergency Centre.


General Hotline: 2334-2334


24-Hour Emergency Hotline: 6828-6620

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