Aural Hematoma

An aural hematoma, also known as an ear hematoma, is a blood-filled swelling in a dog's ear flap, or pinna. It's caused by broken capillaries and separated skin and cartilage in the ear, and can be unilateral or bilateral. Looks like swollen ear one side or either side.

The most common cause is repeated vigorous head shaking or scratching from an ear infection, allergies, or other irritations due to ticks or mites. Dogs with floppy ears are also at higher risk. Other causes include allergic skin disease, immune disorders, or blood clotting deficits. 

Signs of an aural hematoma include: Head shaking, Intense ear scratching, Warmth to the touch, Redness of the skin, and Discomfort. 

If left untreated, an aural hematoma can be painful and lead to scarring that blocks the ear canal and affects hearing. To prevent an aural hematoma from developing, you should schedule a vet appointment as soon as you notice your dog shaking their head. 

Treatment for an aural hematoma involves draining the blood blister with a small incision and then closing the pocket with stitches along with compress hematoma bandage.

The pinna is then bandaged over the head to promote adhesion of the skin and cartilage. 

After treatment, your vet may remove drainage tubes or bandages after 3–14 days. Sutures can be removed after two weeks if the ear is completely healed, but may need to remain in place longer in severe cases.