How Do I Treat Ringworm in My Cat
Medically Reviewed by Dr. Sarah Jenkins, DVM, Feline Internal Medicine Specialist
Understanding Ringworm in Cats
Despite its name, ringworm has nothing to do with worms. It’s a fungal infection caused by organisms called dermatophytes that live on the surface of skin, hair, and sometimes nails. The name comes from the characteristic circular lesions that appear on infected skin. Ringworm is zoonotic, meaning it can spread from cats to humans and vice versa, making prompt attention important for the health of your entire household.
How Cats Contract Ringworm
Cats can become infected with ringworm through direct contact with an infected animal, contact with contaminated objects such as bedding, grooming tools, or furniture, or exposure to spores in the environment. Kittens, senior cats, and those with weakened immune systems are particularly susceptible. Even cats without visible symptoms can carry the fungus and spread it to others.
The fungal spores can survive in the environment for extended periods, sometimes up to a year or more, which means decontamination of your home is an important part of managing ringworm.
Recognizing the Signs
Ringworm doesn’t always look the same in every cat. Common signs include circular patches of hair loss, often with a red, scaly border; broken or brittle hair; itchy or irritated skin; darkened skin in affected areas; and inflamed or crusty lesions. Some cats may carry the fungus without showing any visible symptoms at all.
Ringworm lesions commonly appear on the head, ears, and front legs, but can develop anywhere on the body. In long-haired cats, symptoms may be less obvious and can easily be mistaken for other skin conditions.
Getting a Proper Diagnosis
Ringworm cannot be reliably diagnosed by appearance alone, as many other skin conditions look similar. Your veterinarian may use several methods to confirm ringworm, including a Wood’s lamp examination (a special UV light that makes some ringworm fungi glow), microscopic examination of hair samples, or fungal culture. Your vet will recommend the most appropriate diagnostic approach for your cat.
Treatment Approaches
Treatment typically involves a combination of approaches tailored to your cat’s situation. Topical antifungal therapies applied to the skin or in shampoo form help treat localized infections and reduce environmental contamination. Oral antifungal medications work from within to eliminate the infection systemically. Environmental decontamination is equally important for successful treatment.
The duration of treatment varies depending on the severity of infection and the cat’s individual response. Most cases require several weeks to months of consistent treatment. Your veterinarian will establish a treatment plan and monitor progress through follow-up visits.
Decontaminating Your Home
Because ringworm spores persist in the environment, thorough cleaning is essential. Vacuum all carpets and upholstery frequently to remove infected hairs and spores. Wash bedding, toys, and fabric items in hot water. Consider discarding items that cannot be thoroughly cleaned. Steam cleaning carpets and furniture can help kill remaining spores. Dust and mop hard surfaces regularly during the treatment period.
Wear gloves when handling your cat or cleaning contaminated items, and wash your hands thoroughly afterward to protect yourself from infection.
Protecting Yourself and Your Family
Ringworm can spread from cats to humans, particularly those with compromised immune systems, children, and the elderly. Limit close contact with your infected cat during treatment. Wash hands frequently, especially after petting or handling your cat. Keep children away from the cat until the infection is cleared.
If you develop skin lesions, particularly on the hands or forearms, consult a physician for appropriate care.
Preventing Re-infection and Spread
During treatment, keep your cat separated from other pets if possible. Continue environmental cleaning throughout the treatment period, even if your cat appears to be improving. Complete the full course of any prescribed treatment, even after symptoms seem to resolve. Regular veterinary check-ups help confirm that the infection has been fully cleared.
Disclaimer: This article is for informational purposes only and does not constitute professional veterinary advice. Ringworm requires proper diagnosis and treatment by a qualified veterinarian. If you suspect your cat has ringworm, or if you notice any skin lesions on yourself or family members, please consult a veterinarian or physician for proper evaluation and appropriate care.