What should you know about cat ear ringworm?

Ringworm is not caused by a worm. Fungal spores can affect the outer skin and hair, including the ear flap or nearby face. The area may look circular, scaly, crusted, or inflamed, but signs vary and can resemble other problems. More information about [Ringworm](/conditions/ringworm/) and [Scaly Skin](/symptoms/skin-scaling/) can help you understand the terminology. A veterinarian may use an examination, hair or skin sampling, and other tests to distinguish ringworm from mites or allergy.

Book a veterinary visit and limit close contact with other pets until the diagnosis is clearer. Wear gloves when handling affected areas, wash hands afterward, and avoid sharing brushes, bedding, or carriers. Vacuum loose hairs and follow cleaning instructions from the veterinary team. Treatment can involve a [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/) or oral medicine such as [Oral Antifungal Treatment](/treatments/medical-dermatology/oral-antifungal-therapy/), depending on the site and severity. Never put a product into the ear canal unless prescribed for that purpose.

Arrange prompt care if the ear is painful, swollen, leaking, foul-smelling, or being scratched repeatedly. Seek urgent help if the cat becomes weak, stops eating, or develops facial swelling. People or pets with a new [Skin Rash](/symptoms/skin-rash/) after contact should seek medical advice and mention the possible exposure.

Ask how the diagnosis will be confirmed, whether the ear canal is involved, how to protect other household members, and when the cat can safely mix with other animals. Request clear instructions for medicine, bathing, cleaning, and follow-up.