If you notice that your cat has developed an ear hematoma, you might be wondering how to help. Today, our O’Fallon vet team talks about the causes of aural hematomas in cats, symptoms, and treatment options.

A hematoma is a pocket of blood that forms within an organ or tissue and is sometimes referred to as a "blood blister." Aural (ear) hematomas appear between the skin and cartilage of your cat's ear flap and can vary in size and location. They are uncommon in cats, but that makes it even more important for pet parents to understand what to look for and what to do if their cat develops an ear hematoma.

What Causes Ear Hematomas In Cats?

The most common cause of ear hematoma is trauma or injury. When the small blood vessels in the cat's ear flap are damaged, they break and leak internally, resulting in a blood-filled swelling or pocket. Cat eat hematomas are caused by a variety of factors, including:

  • Your kitty scratching their ears or shaking their heads due to:
    • ear infection
    • ear mites
    • skin allergies
    • foreign object in the ear canal
  • Scratches or bites (e.g. sharp thorns, fights with other cats)
  • Underlying health issues

Symptoms Of Ear Hematoma In Cats 

If your pet has an ear hematoma, the most common sign is likely to be a new bump or swelling on the ear. If it is large enough, the ear flap itself will be swollen and possibly cause it to droop under its weight.

The swelling may feel tight or squishy to the touch, but be gentle - if the spot is tender, your cat will most likely express their displeasure! Aside from changes in the appearance of your cat's ears, keep an eye on their behavior. If their ear is irritated or tender, they may groom the area more frequently than usual or avoid being touched.

Diagnosis & Treatment Of Ear Hematomas In Cats

Your veterinarian will carefully examine your cat's ears for mites or infections. Aside from the injury to the area, these are common causes of hematomas, especially if your pet is prone to infections. Depending on the circumstances, your veterinarian may take a sample with a needle to confirm the nature of the condition.


The most commonly recommended method for treating ear hematomas is a simple surgical procedure. If the hematoma on your cat's ear is small or your pet cannot be safely sedated, your vet may be able to drain the site with a needle. While this procedure is appropriate for some hematomas, it is not ideal, and the problem is likely to reoccur. Aural hematoma surgery is a permanent solution to your pet's problem, and surgical removal of hematomas can reduce scarring.

Your vet will also treat the underlying issue causing the hematoma (e.g. infection, allergy).

What Happens if You Leave a Cat Ear Hematoma Untreated?

If the hematoma is not treated, it will gradually dissolve, but the associated inflammation will have caused damage to the surrounding ear tissues, resulting in a distorted, cauliflower-shaped ear. Aural hematomas are extremely painful and should be treated on humane grounds.

Aural Hematoma Surgery For Cats

The veterinarian performs cat hematoma surgery by making a small surgical incision in the ear flap to drain the blood pocket. Following that, your veterinarian will use tiny sutures to close the pocket and prevent further blood or infection buildup. The vet or vet surgeon will bandage the ear to prevent blood from accumulating there.

Post-Surgery Recovery

Your cat could feel some tenderness around the ear for a few days after surgery, but your vet is sure to provide medications to address pain and prevent infection and inflammation.

Your cat will need to wear an Elizabethan collar to stop them from scratching the surgical site and causing inflammation, bleeding, pulled stitches, or infection.

Your vet will give you instructions and helpful advice on how to care for your feline friend at home while they recover from surgery, as well as when to return for follow-up visits and to have the stitches removed.

Note: The advice provided in this post is intended for informational purposes and does not constitute medical advice regarding pets. For an accurate diagnosis of your pet's condition, please make an appointment with your vet.

Does your cat have a hematoma on its ear? Contact our O’Fallon team today to help your beloved pet feel better with our compassionate expert veterinary care.