Cat Ear Care: Mites, Infections, and When to See a Vet

You peek inside your cat’s ear, notice some dark wax, and immediately wonder if you should be cleaning it. Most of the ear care advice online is written for dogs, and it usually says “clean regularly.” For cats, that advice is often wrong. Most cats never need their ears cleaned at all, and routine cleaning of a healthy ear can actually cause problems.

What healthy cat ears look like

The inside of a healthy cat ear is pale pink, with a small amount of light brown or golden wax. There should be no strong smell, no visible swelling, and no scratches or crusts on the skin. If you gently touch the ear, your cat shouldn’t flinch or pull away.

Cats have a key anatomical advantage over dogs: their ear canals have very little hair. That, combined with efficient self-grooming using their back paws, is why cats have far lower rates of ear infections than dogs do (Brame & Cain, 2021). A weekly visual check-in is plenty for most cats. Just look, don’t dig.

When to clean versus leave alone

Over-cleaning healthy ears is a real problem. The ear canal has its own balance of oils, wax, and resident microbes. Flushing it with cleaner on a schedule can disrupt that balance and actually trigger infections that wouldn’t have happened otherwise.

Clean only when there’s a specific reason:

• Your vet recommended it as part of treating an ear condition
• You can see visible debris or dark waxy buildup
• Your cat swam or got water in the ears (rare in cats)

Don’t clean if:

• The ears look normal
• The ear is red, inflamed, or painful (could indicate a ruptured eardrum, which makes most cleaners unsafe)
• You haven’t checked with a vet first and something is clearly wrong

Warning signs that need a vet

Balance problems, circling, and eye flickering suggest the middle or inner ear is involved, which is more serious than a simple external ear issue. Vestibular symptoms can also cause nausea and vomiting, so if you see these signs together, that’s a quicker vet visit. Our vomiting guide covers how to tell different vomiting causes apart.

A soft ballooned pocket on the ear flap is an aural hematoma, which is bleeding under the skin usually caused by your cat scratching or head-shaking from an underlying ear problem. It needs treatment, but more importantly, the underlying cause needs to be found or the hematoma will come back.

Common ear problems in cats

Ear mites

Ear mites (Otodectes cynotis) are the single most common cause of ear problems in cats. In a 2021 review of feline otitis, ear mites were implicated in 53-69% of clinical cases (Brame & Cain, 2021). They’re especially common in kittens, multi-cat households, and cats that go outdoors or came from shelters or catteries.

The classic sign is dark, crumbly debris that looks like coffee grounds, combined with a lot of ear scratching and head shaking. Mites are highly contagious between cats through direct contact (they don’t jump like fleas), so if one cat has them, all cats in the home usually need treatment.

But “coffee-ground wax” is not a reliable diagnosis on its own. Yeast infections, bacterial infections, and ear polyps can all produce similar-looking debris. The only way to be sure is microscopic examination of an ear swab, which your vet can do in minutes. The treatments are completely different: mites need an acaricide, yeast needs an antifungal, bacteria need an antibiotic. Treating the wrong thing wastes time and can make the real problem worse.

Modern treatment is simple. A single dose of a systemic acaricide like selamectin, moxidectin, or fluralaner (applied topically to the skin between the shoulder blades) usually resolves mites. Old-school drop-based treatments worked but needed weeks of daily application.

Bacterial and yeast infections

Otitis externa, inflammation of the outer ear canal, can be caused by bacteria, yeast (Malassezia), or both. Yeast is found in 58-95% of cats with otitis, though often as a secondary player rather than the root cause (Brame & Cain, 2021).

The underlying cause is often allergies. In cats with feline atopic syndrome, 16-20% develop otitis at some point. If your cat keeps having recurrent ear infections, the right answer usually isn’t more ear cleaning. It’s investigating the allergies underneath. Food trials, environmental allergy workups, and flea control are more useful than another round of ear drops.

Inflammatory polyps

This one is worth knowing about because it’s a cat-specific problem that many owners have never heard of. Inflammatory polyps are benign growths that start in the middle ear or Eustachian tube and grow outward, either into the ear canal or the back of the throat. They’re most common in young cats, typically under 3 years old.

Polyps matter here because they can look exactly like a chronic ear infection that won’t get better with normal treatment. If your cat keeps having ear problems that return despite appropriate treatment, especially a young cat, polyps are worth asking about. Diagnosis usually needs sedation and a proper look, sometimes with imaging. Removal is either by traction through the canal (some recurrence) or surgery on the middle ear (more definitive).

Ear tumors in older cats

In senior cats, chronic ear inflammation over many years can occasionally lead to ceruminous gland adenocarcinoma, the most common malignant ear tumor in cats. It’s locally invasive but rarely spreads to distant organs. For older cats, persistent one-sided ear discharge or growths visible in the canal deserve a thorough vet workup, not just another cleaning.

How to clean safely (when it’s actually needed)

Ask your vet which cleaner to use. They’ll recommend a gentle veterinary ceruminolytic, a product designed to break down wax safely. Don’t improvise with household products.

The basic technique:

1. Fill the ear canal with the cleaner (the bottle will have a soft tip)
2. Gently massage the base of the ear for 20-30 seconds (you’ll hear a squishy sound)
3. Let your cat shake their head
4. Wipe visible debris from the outer ear with a cotton ball or gauze

Never push anything into the ear canal. That includes cotton swabs, your finger, or the tip of the cleaner bottle. The canal bends 90 degrees inside the ear, and anything pushed straight down can damage the eardrum or pack debris deeper.

What not to use

• Cotton swabs (Q-tips) inside the canal — they can rupture the eardrum and push debris deeper
• Hydrogen peroxide — irritates ear tissue and leaves moisture that feeds yeast
• Rubbing alcohol — stings and burns inflamed skin
• Water — retained moisture promotes infection
• Vinegar, witch hazel, or essential oils — irritating to inflamed ear tissue

Common misconceptions

“Dark wax means ear mites.” Not necessarily. Dark wax can also be yeast, bacteria, polyps, or even normal. The only reliable way to know is a vet examining a swab under a microscope. Treating for mites when the problem is yeast means the real infection keeps going.

“Ear mites spread like fleas, jumping between pets.” They don’t jump. Transmission is by direct contact. But because cats groom and sleep together, one infested cat in a household usually means all cats need treatment.

“Scottish Folds get more ear infections because of their folded ears.” This is a common assumption, but research doesn’t support it. Folded ears haven’t been shown to increase otitis rates. The real Scottish Fold health concern is osteochondrodysplasia, a painful genetic cartilage condition affecting joints throughout the body, which is a separate issue entirely.

“Cats need their ears cleaned as regularly as dogs do.” Cats aren’t small dogs. Their ear anatomy is different, their grooming behavior is different, and their infection rates are much lower. Most healthy cats never need ear cleaning. Weekly visual checks are plenty.

If your cat’s ears look clean, smell normal, and aren’t bothering them, leave them alone. When something actually looks off, that’s when to get a vet involved. The biggest favor you can do for most cats’ ears is to not over-manage them.