A cat that scratches at an ear, shakes its head or has dark, smelly debris may have an ear problem. Mites, yeast, bacteria and inflammation can look alike from the outside, but they do not all need the same treatment. An examination matters before using ear drops.
What to look for
- Repeated scratching or head shaking
- Redness, tenderness, bad odor or excess wax
- Dark, crumbly or moist debris in the ear
- Head tilt or poor balance
- Discomfort when the ear is touched
Urgent veterinary care is needed if your cat is very painful, cannot balance, has a pronounced head tilt or eye movements, seems profoundly ill, or shows neurologic changes. Changes in hearing or balance may indicate deeper ear involvement.
Possible causes
Ear mites are common in some cats, particularly kittens or cats exposed to other animals. Yeast and bacterial infections may also occur, sometimes alongside underlying inflammation. A mass, polyp or foreign material can contribute to recurrent problems. Dark debris alone cannot prove a mite infestation.
How vets identify the problem
The veterinarian may look inside the ear using an otoscope and examine a small sample of debris under a microscope. Checking the eardrum is important because some products may be unsafe if it is damaged. In recurring cases, the veterinary team may search for an underlying contributor rather than repeating the same drops.
Cornell’s overview of feline otitis describes why untreated outer-ear disease can sometimes progress deeper and affect hearing or balance.
Avoid improvised ear cleaning
Do not put alcohol, peroxide, essential oils, human ear drops or cotton swabs deep into the canal. Even seemingly gentle cleaning may cause pain or push debris farther inward. Ask your veterinarian whether and how to clean the ear before treatment. Keep prescribed drops and the medication schedule exactly as instructed.
Does telehealth help?
An online veterinarian may assess urgency from photos or a history, but cannot reliably view the eardrum or test the debris. A new ear problem usually needs an in-person examination to choose effective, safe treatment.
Sources: Cornell: otitis; Cornell: ear mites.
General information, not an online diagnosis or veterinary review claim.
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.