Your cat usually leans into a scratch behind the ears. Lately, they pull away, shake their head, and go straight back to scratching. There may be an unfamiliar smell or dark buildup inside one ear. Those small changes can be the first clues that an ear is sore.
Cat ear infections often cause head shaking, itching, redness, odor, and discharge. Treatment usually involves medication chosen after an ear examination and microscopic testing. Ear mites, allergies, or a blockage may also need treatment to keep the problem from returning.
Call your veterinarian when these signs appear. A new head tilt, loss of balance, or unusual eye movements needs urgent assessment.
Symptoms You Might Notice at Home
An occasional scratch during grooming is different from a cat repeatedly stopping what they’re doing to work at the same ear.
Common cat ear infection symptoms include:
- Frequent head shaking or scratching around the ears.
- Rubbing one side of the face against furniture or the floor.
- Redness, swelling, or sores around the ear opening.
- More wax or discharge than usual.
- An unpleasant smell coming from the ear.
- Pulling away when you touch the head or ear.
Some cats become quieter or less interested in being petted because handling hurts. One ear may be affected, or both may be uncomfortable.
Discharge can look brown, black, yellow, or creamy. Its appearance does not reliably identify the cause. A little wax can be normal; a change accompanied by odor, redness, or discomfort deserves a veterinary exam.
Forceful scratching and head shaking can also damage blood vessels in the ear flap, creating a swollen pocket of blood called an aural hematoma. A newly puffy ear flap needs veterinary attention rather than home draining.
A Head Tilt or Trouble Walking Changes the Urgency
An itchy ear warrants a prompt appointment. Signs involving balance or the face need more urgent attention because deeper ear structures or nerves may be involved.
Contact a veterinarian immediately about a new persistent head tilt, stumbling, circling, rapid involuntary eye movements, facial drooping, or difficulty blinking. Seek emergency care when your cat cannot stand, keeps falling or rolling, has seizures, or is rapidly becoming less responsive.
These changes do not automatically mean an ear infection. Other neurological conditions can look similar, and an examination is needed to tell them apart.
While arranging care, keep an unsteady cat away from stairs and high furniture. Avoid putting cleaner or medication into the ear before receiving veterinary advice.
Where an Ear Infection Happens
The location affects both symptoms and treatment.
Otitis externa means inflammation of the outer ear canal, the passage leading toward the eardrum. Bacterial or yeast overgrowth often accompanies that inflammation.
Otitis media affects the middle ear, behind the eardrum. Otitis interna involves the inner ear, which contains structures involved in hearing and balance. These deeper problems can require more extensive testing and longer treatment.
An ear that looks fairly normal at the opening can still have disease farther inside. Looking into the visible part at home cannot rule it out.
Why Cats Develop Ear Infections
Bacteria and yeast often multiply after something has disturbed the ear canal. Finding that initial problem is part of treatment, especially when infections keep coming back.
Ear mites and the irritation they cause
Ear mites in cats are tiny parasites that feed on material within the ear canal. They can cause intense itching and dark debris that resembles coffee grounds.
That appearance is a clue, not a diagnosis. Other ear problems can produce similar buildup, so your vet checks for mites rather than relying on color alone.
Mite irritation can also lead to a secondary bacterial or yeast infection. A cat may need treatment for both problems.
Allergic skin disease
The ear canal is lined with skin, so allergies can affect it along with other parts of the body. A cat with recurring ear inflammation may also have itching, scabs, or excessive grooming elsewhere.
Food or environmental allergies are possibilities, but an itchy ear alone does not establish either diagnosis. Your vet may recommend a structured investigation, including a supervised diet trial when appropriate.
Polyps, trapped material, and other blockages
An inflammatory polyp is a noncancerous growth that can interfere with the ear canal or middle ear. Foreign material and other masses can also cause irritation or obstruct the canal.
Persistent trouble in the same ear deserves a closer look. Drops may reduce an infection temporarily while the underlying obstruction remains.
Rough or excessive cleaning can create additional irritation, too. More cleaning is not always the answer to recurring wax.
What Your Veterinarian Checks Before Prescribing Drops
The appointment usually starts with questions about when the problem began, which ear is affected, and whether it has happened before. Tell your vet about skin itching, new pets, balance changes, and any cleaners or medications already used.
An otoscope, a lighted instrument with magnification, helps the vet examine the canal for swelling, debris, mites, foreign material, and growths. They also assess the eardrum when it can be seen.
This matters for medication safety. Some ear products can damage hearing or balance structures when the eardrum is ruptured.
A sample of discharge is usually examined under a microscope. This test, called ear cytology, helps identify yeast, bacteria, and inflammatory cells. A separate microscopic preparation may be used to look for mites.
When an infection is severe, keeps returning, or is not responding to treatment, a bacterial culture and susceptibility test may help guide antibiotic selection. Suspected middle ear disease or a growth may call for imaging, such as a CT scan, or tissue sampling.
A very painful or blocked ear can be difficult to examine thoroughly while a cat is awake. Sedation or anesthesia may allow a safer examination and cleaning. Ask the clinic whether to leave the ear uncleaned before the visit so the discharge can be assessed and sampled.
Veterinary Treatment for Cat Ear Infections
Cat ear infection treatment addresses the organisms present, the inflammation, and any underlying cause. The plan also depends on how deeply the ear is affected.
Medication placed in the ear
For many outer ear infections, treatment is applied directly to the canal. A prescription may contain an antibiotic for bacteria, an antifungal for yeast, or both. Some preparations also contain a corticosteroid to reduce inflammation and swelling.
These ingredients serve different purposes. An antibiotic will not treat a yeast infection or kill ear mites.
Your vet chooses the product based on the examination, test results, and eardrum findings. Human ear drops or a medication prescribed for another pet may be unsuitable.
Cleaning and pain control
Thick wax and discharge can prevent medication from reaching the affected tissue. Your vet may clean the canal and recommend a specific cleaner for use at home.
Severely inflamed ears may need cleaning under sedation or anesthesia. Pain medication or additional treatment to reduce swelling may also be prescribed.
Cleaning is part of some treatment plans, but the product and technique matter. Follow the instructions for your cat’s particular ear problem.
Treatment for mites or an underlying condition
Confirmed ear mites need an effective antiparasitic medication. Depending on the product, treatment may be applied to the skin or administered into the ears.
An allergy may require ongoing management. A foreign object needs removal, and a polyp or another growth may require a procedure. Treating only the accompanying infection can leave the original problem unresolved.
Oral medication and surgery
Oral antibiotics are not automatically needed for an uncomplicated outer ear infection. They may be appropriate when there is middle or inner ear involvement or another specific reason identified by your veterinarian.
Deep infections can require a longer medication course, additional cleaning, and close monitoring. Severe disease may need specialist care.
Surgery is sometimes considered when a growth must be removed or chronic damage has left an ear canal persistently painful and unresponsive to medical treatment.
Caring for Your Cat During Treatment
Before leaving the clinic, ask the veterinary team to show you how to give each product. Confirm which ear to treat, how much to use, how often to give it, and whether cleaning should happen before medication.
A simple routine can help:
- Prepare the prescribed product and a reward in a quiet place.
- Gently lift the ear flap and apply the instructed amount without pushing the bottle tip into the canal.
- Massage the base of the ear only as demonstrated by your vet and tolerated by your cat.
- Give your cat a break and a reward afterward.
Call the clinic if your cat is too painful or distressed for treatment. The team may be able to adjust pain control, the formulation, or the treatment approach.
Use cat ear cleaner only when your vet recommends it. Wipe accessible discharge with the material they suggest, such as gauze, without digging into the canal. Cotton swabs can push debris deeper or injure the ear.
Avoid peroxide, rubbing alcohol, vinegar mixtures, and essential oils. Do not reuse leftover medication without checking with your vet.
New loss of balance, head tilt, or apparent hearing changes after an ear product needs prompt veterinary advice before further use. Bring the product details when you call.
How Long Does Treatment Take?
An uncomplicated outer ear infection may start looking and feeling better within a few days. The full treatment course can last one to several weeks, depending on the cause, medication, and response.
Middle and inner ear infections often require longer treatment. Some bacterial inner ear infections need six to eight weeks of antibiotics or more, with the schedule determined by the veterinarian.
Less scratching does not necessarily mean the infection has cleared. Keep the prescribed schedule and attend the recheck, which may include another ear examination and cytology.
Call sooner when pain, odor, discharge, or swelling worsens, or improvement is not happening within the timeframe your vet gave you.
What Repeated Infections May Mean
Repeatedly treating the same ear without investigating the cause can lead to a cycle of temporary improvement and relapse.
Possible explanations include unresolved mites, allergic skin disease, a polyp, middle ear involvement, or chronic changes that narrow the canal. Difficulty getting medication into the ear, treatment reactions, or an organism that does not respond to the chosen drug can also complicate recovery.
Bring a list of previous products and note how long each helped. That history can be more useful than simply asking for the same drops again.
Your vet may suggest further testing or referral to a veterinary dermatologist or surgeon.
Are Cat Ear Infections Contagious?
Most bacterial and yeast ear infections are not directly contagious between household pets. Ear mites are different: they can spread through close contact between cats and dogs.
When mites are diagnosed, all cats and dogs in the household generally need coordinated treatment, even when only one is scratching. Your vet should select a suitable product for each animal’s species, age, and health.
Do not share ear medication between pets. Similar-looking discharge does not mean they need the same treatment.
Keeping Comfortable Ears Healthy
Many cats with healthy ears do not need routine ear cleaning. Overcleaning can irritate the canal and create problems of its own.
During normal petting, check for a new smell, redness, excess discharge, or sensitivity. Follow any cleaning schedule recommended for a cat with an ongoing condition, and ask your vet whether parasite prevention should include ear mite coverage.
A short video of repeated head shaking or an unusual head position can help the veterinary team understand what you are seeing. Make the appointment when those changes appear, so your cat can get relief and the cause can be addressed.