📄 Key takeaways from the article
- Ear mites (Otodectes cynotis) are the most common cause of ear infections in young cats and cats living in multi-pet households.
- A cat that shakes its head, scratches its ears, or has an unusual odor should be examined by a veterinarian.
- Cotton swabs should be avoided: they risk pushing secretions deeper or injuring the ear canal.
- An untreated ear infection can progress to a perforated eardrum, hearing loss, or an ear hematoma caused by scratching.
- Treatment depends on the exact cause (parasites, bacteria, yeast, allergy) and requires a precise veterinary diagnosis, not self-medication.
A cat that shakes its head a little too often, scratches its ear insistently, or whose ear flap emits an unusual odor is sending a signal that should not be ignored. Otitis, which is inflammation of the ear canal, is a frequent reason for veterinary consultation in cats, and its causes are varied: parasites, infections, allergies, or even foreign objects. Recognizing it properly and knowing how to maintain your companion's ears on a daily basis can prevent many complications.
What is otitis in cats?
Otitis refers to inflammation of the external ear canal, and sometimes deeper areas when it reaches the middle or inner ear. It can affect one or both ears and manifests as an accumulation of earwax, debris, or abnormal secretions, often accompanied by itching and discomfort for the animal. Contrary to popular belief, otitis is not a disease in itself but a symptom: it almost always reflects an underlying trigger that is important to identify to prevent recurrences.
Common causes of otitis in cats
Ear mites (Otodectes cynotis)
This is the most common cause of otitis in kittens and young cats, especially those that have lived in groups, shelters, or environments with several animals. This tiny mite, invisible to the naked eye, lodges in the ear canal where it feeds on earwax and dead cells. It is transmitted very easily through direct contact, especially from mother to kittens or between companions that groom each other. The resulting secretions have a characteristic dark and grainy appearance, often compared to "coffee grounds," and are accompanied by intense itching that drives the cat to scratch itself until it sometimes sustains injuries. However, some cats carrying the parasite remain asymptomatic, which complicates diagnosis by the naked eye.
Bacterial and yeast infections
A proliferation of bacteria or yeast (microscopic fungi such as Malassezia) can also trigger an ear infection, often secondary to another problem: excessive moisture, excess earwax, or initial irritation caused by mites. These infections require precise identification of the germ involved, as treatment differs depending on whether it is a bacterium or a yeast.
Allergies and excess earwax
As in dogs, food or environmental allergies can manifest as chronic inflammation of the ear canal, often associated with other skin signs (itching on the body, excessive licking). Excessive earwax production, without an identified infectious cause, can also promote the development of an ear infection if it is not regularly removed.
Foreign objects, polyps, and tumors
More rarely, a grass seed or vegetable debris can lodge in the ear of a cat that goes outside, causing sudden, unilateral discomfort. In older cats, inflammatory polyps or, more rarely, tumors may also be the cause and require a thorough examination to be ruled out or managed in time.
Warning signs
Several signs should prompt a quick consultation: your cat shakes its head repeatedly, scratches one or both ears, tilts its head to one side, shows heat or pain when the ear is touched, emits an unpleasant odor, or shows a brown, black, or yellowish discharge associated with visible redness in the canal. In more advanced cases, more worrying signs may appear: loss of balance, abnormal eye movements, a permanently tilted head, or loss of appetite due to pain. These latter symptoms indicate a deeper involvement and justify an emergency consultation.
Diagnosis and treatment: the role of the veterinarian
When faced with dirty or irritated ears, the temptation to clean them yourself before consulting can be great, but a precise diagnosis remains essential. The veterinarian performs an otoscopic examination to visualize the state of the canal and the eardrum, and often takes a sample of earwax to observe under a microscope (cytology), which makes it possible to identify with certainty the presence of mites, bacteria, or yeast. This step is essential because the treatment differs completely depending on the cause: an antiparasitic for ear mites, a local antibiotic for a bacterial infection, an antifungal for yeast, possibly combined with an anti-inflammatory to relieve pain. A thorough cleaning of the canal is also part of the treatment, as accumulated debris can limit the effectiveness of locally applied medications. In simpler cases, improvement is observed in seven to ten days; more severe or deep-seated infections may require two to three weeks of treatment, or even more in case of relapse or a persistent underlying cause.
Proper daily maintenance of your cat's ears
Regular maintenance, even in the absence of a problem, makes it possible to quickly spot any anomaly and limit the accumulation of earwax that is favorable to infections.
The correct cleaning method
Use only an ear lotion suitable for cats, never a cotton swab: it risks pushing secretions deeper into the canal or even injuring the eardrum if the cat moves suddenly. The recommended method is to soak a compress or soft cotton ball with lotion, gently massage the base of the ear to loosen impurities, and then wipe only the visible part of the ear flap, without ever inserting the tip deeply.
How often should you clean a cat's ears?
Most healthy cats only need occasional maintenance, as their ears are naturally self-cleaning. Cleaning too frequently can even unbalance the natural flora of the canal and promote infections. In the event of excessive earwax production, predisposition (breeds with drooping or very hairy ears), or frequent trips outside, more regular checks, on the advice of the veterinarian, may be useful.
Special cases
Kittens and cats from group settings
Kittens adopted in shelters or born in environments with several cats are particularly exposed to ear mites. A systematic veterinary check of the ears is generally part of the entry health check, and it is recommended to treat all animals in the household simultaneously in the event of a positive diagnosis, to avoid recontamination between them.
Cats that go outside
Cats with access to the outdoors are more exposed to foreign objects (grass seeds, vegetable debris) and external parasites in general. A regular check of the ears after outings, especially in summer, makes it possible to quickly spot unusual discomfort.
Senior cats
In senior cats, a persistent or recurrent ear infection should be given special attention, as it can sometimes reveal a polyp or a benign tumor of the ear canal, which are more frequent with age. Regular veterinary monitoring remains the best prevention.
Complications of an untreated ear infection
Neglecting an ear infection, even if it seems mild at first, exposes the cat to serious complications: perforation of the eardrum, extension of the infection to the middle or inner ear (which can cause neurological or balance disorders), partial or permanent hearing loss, or chronic pain. Excessive scratching can also cause an aural hematoma, a pocket of blood that forms under the skin of the ear flap following the rupture of small vessels, sometimes requiring surgery to be absorbed. These are all reasons never to ignore symptoms that seem, at first glance, to be of no consequence.
FAQ: your questions about ear infections in cats
Can I clean my cat's ears with a cotton swab?
No, it is highly discouraged. A cotton swab risks pushing secretions deeper into the canal or injuring the eardrum. Opt for a compress or a soft cotton ball associated with a suitable ear lotion.
How do I know if my cat has ear mites?
The most characteristic sign is a dark, granular secretion resembling coffee grounds, associated with intense itching. However, only a veterinary examination under a microscope can confirm the presence of the parasite with certainty.
Is a cat ear infection contagious to other animals in the household?
If it is due to ear mites, yes: this parasite is easily transmitted through contact between animals. It is then recommended to have all cats and dogs in the household examined and, if necessary, treated at the same time.
Should I seek emergency care if my cat tilts its head to one side?
Yes, a persistently tilted head, associated with loss of balance or abnormal eye movements, may indicate an issue with the middle or inner ear and requires a prompt consultation.
Do ear infections return often in the same cat?
They can recur if the underlying cause (allergy, excess earwax, particular anatomy) has not been identified and managed. This is why a precise diagnosis, rather than simple occasional cleaning, is essential in case of repeated episodes.
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