Why Is My Cat Scratching Its Ears: Ear Mites or Infection?

April 22, 2025

If you’ve noticed your cat scratching its ears excessively or finding small scratches on its head near the ears, it’s natural to wonder what might be causing the irritation. Ear issues in cats can stem from several conditions, the most common being ear mites or an ear infection. Understanding the symptoms and differences between these conditions is crucial for getting your feline companion the right treatment.

Ear Mites vs. Ear Infections

A general rule for ear problems in pets is:

  • If a cat is scratching its ears and you notice dark brown or black crusty debris inside the ear canals, it likely has ear mites. A veterinarian can confirm this using a microscope.
  • If a dog is scratching its ears and has debris in the ear canals, it is usually an ear infection. Ear mites are far less common in dogs than in cats.

Ear mites, scientifically known as Otodectes cynotis, are tiny parasites that live inside the ear canal, feeding on skin debris and causing intense itching. If left untreated, they can lead to secondary infections due to constant scratching and irritation.

Why Are Ear Mites So Difficult to Eradicate?

Ear mites are highly contagious among cats, spreading easily through close contact. They are microscopic and can be difficult to eliminate completely, as they reproduce quickly and often persist even after initial treatment. Many over-the-counter treatments claim to be effective but may not fully eradicate the problem.

Diagnosing Ear Mites in Cats

If you suspect your cat has ear mites, a veterinary examination is essential. Your veterinarian will collect a small sample of the dark debris from the ear canal and examine it under a microscope to confirm the presence of mites. While the symptoms can be a strong indicator, microscopic confirmation ensures the correct diagnosis and appropriate treatment.

Treatment Options for Ear Mites

Cat with cherry blossoms in springtime
Photo by Gundula Vogel on Pexels

Once ear mites are diagnosed, your vet will recommend a treatment plan tailored to your cat’s needs. Common treatment options include:

  • Topical Medications Applied in the Ears – These treatments are specifically formulated to kill ear mites and should be prescribed by a veterinarian. Many pet stores or online treatments are ineffective, so always consult your vet before choosing a product.
  • Topical Medications Applied on the Skin – Some flea and tick preventatives, like Revolution, can also kill ear mites. These are convenient for pet owners who prefer an easier application method.
  • Systemic Medications – Injectable or oral treatments may be recommended in some cases, particularly if the infestation is severe or if the cat has an underlying condition that makes topical treatments less effective.

Regardless of the treatment method, ear mites must be treated for at least three weeks to ensure that all mites, including newly hatched ones, are eliminated. It’s important to follow up with your vet after the treatment period to confirm that the infestation is completely gone.

Other Potential Ear Problems in Cats

While ear mites are a common cause of ear scratching, they are not the only potential issue. If your cat continues to scratch its ears even after treatment, it could be dealing with another condition, such as:

  • Bacterial or Yeast Infections – Secondary infections can develop if ear mites are left untreated for too long. These infections require specific antifungal or antibiotic treatments.
  • Ear Polyps – Benign growths inside the ear canal can cause irritation and may require surgical removal.
  • Allergies – Cats with environmental or food allergies may develop itchy ears as part of their symptoms. Managing the underlying allergy is necessary for relief.

Preventing Ear Mite Infestations

To prevent ear mites from spreading in your household:

  • Treat all new cats for mites before introducing them to other pets.
  • Regularly check your cat’s ears for signs of mites, especially if they spend time outdoors or around other animals.
  • Keep your cat’s bedding clean and wash it frequently to reduce the risk of reinfestation.

Final Thoughts

Ear mites are a common but treatable condition in cats. If your cat is scratching its ears and you notice dark, crusty debris, schedule a vet visit for proper diagnosis and treatment. With the right care, your cat will soon find relief from the discomfort and return to its happy, playful self.