75A healthy cat's ears should be clean and odour-free. If you notice a foul smell coming from your cat's ears, it could indicate a buildup of earwax or an infection like otitis externa (outer ear infection). Left untreated, ear infections can lead to more serious conditions such as otitis media (middle ear infection) or otitis interna (inner ear infection), potentially causing permanent hearing loss or balance issues.
Common causes of smelly ears in cats include bacterial or fungal infections, ear mites, or excessive moisture from bathing. Symptoms include head shaking, scratching at the ears, black or yellow discharge, and visible redness or swelling. Some cats may become sensitive about having their ears touched due to pain.
Treatment options vary depending on the severity of the infection:
- For mild cases, your vet may prescribe medicated ear drops containing antibiotics or antifungals.
- More severe infections might require sedation for thorough ear cleaning.
- Systemic antibiotics may be needed for bacterial infections spreading beyond the ear canal.
- Ear mites require specific parasiticidal treatments.
To safely clean your cat's ears at home:
- Use a vet-approved ear cleaning solution and cotton balls (never cotton buds, which can damage the ear canal).
- Gently lift the ear flap and wipe only the visible parts of the inner ear.
- Avoid inserting anything into the ear canal.
- Reward your cat with treats to create positive associations with ear cleaning.
Preventive measures include regular ear checks, keeping ears dry during bathing, and prompt veterinary attention at the first sign of irritation. Chronic ear problems may require ongoing management under veterinary supervision.

March 17, 2026
