Why does a cat's ear swell? - briefly
A cat's ear may swell due to infections, allergic reactions, or trauma, such as bites or scratches. Ear hematomas, caused by blood vessel rupture, are also a common reason for swelling.
Why does a cat's ear swell? - in detail
A cat's ear may swell due to a variety of underlying causes, each requiring specific attention. One common reason is an ear infection, often caused by bacteria, yeast, or parasites such as ear mites. These infections can lead to inflammation, redness, and swelling in the ear canal or outer ear. Ear mites, in particular, are highly contagious and can cause intense itching, prompting the cat to scratch excessively, which may worsen the swelling. Another potential cause is an allergic reaction, which can occur due to environmental allergens, food sensitivities, or contact with irritants like certain cleaning products. Allergies can trigger inflammation in the ear tissue, leading to noticeable swelling. Trauma or injury to the ear, such as bites, scratches, or blunt force, can also result in swelling. This may be accompanied by bruising or open wounds, depending on the severity of the injury. Hematomas, which are collections of blood under the skin, can form when blood vessels in the ear rupture due to trauma or excessive scratching. These often appear as a swollen, fluid-filled lump on the ear flap. Foreign objects, such as grass seeds or debris, can become lodged in the ear canal, causing irritation and swelling. In some cases, tumors or growths, whether benign or malignant, may develop in or around the ear, leading to localized swelling. Autoimmune diseases, though less common, can also contribute to ear inflammation and swelling by causing the immune system to attack healthy tissue. It is crucial to monitor the cat for additional symptoms, such as discharge, odor, pain, or changes in behavior, as these can provide further clues to the underlying issue. Prompt veterinary evaluation is essential to diagnose the cause accurately and implement appropriate treatment, which may include medications, cleaning procedures, or surgical intervention depending on the diagnosis. Early intervention can prevent complications and ensure the cat's comfort and well-being.