Ear Hematomas in Cats: Why That Swollen Ear Needs Attention

In this guide

A cat's ear flap should feel thin and flexible. If one ear suddenly looks puffy, thick, or pillow-like, your cat may have developed a haematoma, a pocket of blood trapped under the skin.

What causes it

Haematomas usually form after a small blood vessel in the ear ruptures, most often from vigorous head shaking or scratching. In Indian cats, this is frequently triggered by ear mites, ear infections, allergies, or a scuffle with another cat that leaves the ear itchy or irritated.

What it looks like

• One ear noticeably fuller or heavier than the other
• A soft, fluid-filled swelling on the inside of the ear flap
• The cat tilting its head toward the affected side
• Frequent scratching or head shaking before the swelling appeared

Why the underlying cause matters as much as the swelling

Treating the haematoma without addressing why the cat was scratching in the first place, whether that is mites, an infection, or allergies, often leads to the problem coming back. A vet will typically check inside the ear canal before deciding on treatment.

Treatment options

• Small haematomas may be monitored or drained by a vet
• Larger ones often need a minor surgical procedure to prevent the ear from healing into a permanently crumpled shape
• Medicated ear drops or oral medication to treat mites, infection, or allergy

What not to do

Never attempt to drain or pop the swelling at home. This risks infection and repeated bleeding. Book a vet visit as soon as you notice the swelling, since prompt treatment gives the best chance of the ear healing back to its normal shape.

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