Can I Get Ring Worm from My Cat or Dog and Give It Back to Them?

Ring worm is a common skin infection caused by fungi called dermatophytes. Despite its name, it’s not caused by worms. Cats and dogs often carry these fungi on their skin or fur without obvious signs. Humans can catch ring worm from infected pets—and, in some cases, pass it back to animals. Understanding how transmission happens and what to do about it can help you and your pet stay healthy.

What Is Ring Worm?

• Ring worm is a fungal infection affecting skin, hair and nails.
• In pets, it often appears as circular patches of hair loss, scaly skin or redness.
• In people, it shows up as red, itchy, ring-shaped rashes with clearer centers.
• Several fungal species can cause ring worm, including Microsporum canis, common in cats and dogs.

How Transmission Works

Ring worm spreads when fungal spores touch skin or fur. Here’s how the cycle typically goes:

1. Pet to Person

   • You pet an infected cat or dog, brushing against fungal spores.
   • Spores settle on your skin, multiply and cause an infection.

2. Person to Pet

   • If your skin still carries live spores—even after you start treatment—you can touch your pet and transfer fungi back.
   • Pets with weak immune systems or underlying skin issues are especially vulnerable.

3. Environmental Reservoirs

   • Fungal spores can live for months on bedding, carpets, grooming tools and furniture.
   • Both you and your pet can pick them up repeatedly from these sources.

Signs and Symptoms

In Humans

• Circular, red or pink rash with raised, scaly edges
• Center of the rash often looks clearer
• Itching or burning sensation
• Possible hair loss if ring worm affects the scalp

In Cats and Dogs

• Circular patches of hair loss, often on head, ears, paws or tail
• Scaly or crusty skin in affected areas
• Redness or inflammation
• In long-haired breeds, you might see dandruff-like flakes

Who’s at Risk?

While anyone can get ring worm, some people and pets face higher risk:

• Children, due to close play with pets
• People with weakened immune systems
• Animals in shelters or catteries, where density and stress are higher
• Overcrowded or humid living environments

Preventing the Spread

Stopping ring worm means breaking the cycle of transmission. You can do this by combining hygiene, environmental control and monitoring.

Hygiene Measures

• Wash your hands with soap and water after handling pets.
• Wear disposable gloves when treating or grooming an infected animal.
• Bathe your pet with veterinarian-approved antifungal shampoos.

Environmental Cleaning

• Vacuum carpets, rugs and upholstery daily.
• Wash pet bedding, human bedding and towels in hot water (at least 60°C/140°F) weekly.
• Disinfect hard floors and surfaces with diluted bleach solution (1 part bleach to 10 parts water) or a pet-safe antifungal spray.

Monitoring and Isolation

• Keep infected pets separated from other animals and people until they’ve fully recovered.
• Check other pets and family members for signs of ring worm.
• Consider a free, online symptom check, using the doctor approved Ubie Symptom Checker to see if your symptoms match ring worm and to decide next steps.

Treating Ring Worm

Early treatment reduces itching, speeds healing and cuts down the chance of re-infection.

In Humans

• Topical antifungal creams, lotions or powders (e.g., clotrimazole, terbinafine) applied daily for 2–4 weeks.
• Keep the affected area clean and dry—fungi thrive in warm, moist environments.
• Avoid sharing towels, clothing or bedding until the infection clears.

In Pets

• Follow your veterinarian’s instructions for oral or topical antifungals.
• Medications may include griseofulvin, itraconazole or terbinafine, depending on severity.
• Daily antifungal baths or dips for at least 2–4 weeks, even if lesions improve early.

Can I Give Ring Worm Back to My Pet?

Yes. If you or a family member remains infectious—carrying spores on skin, hair or clothing—you can reinfect your pet. To prevent this:

• Continue treating both people and pets until a vet and a doctor confirm cure.
• Maintain strict hygiene even after symptoms disappear, since spores can linger.
• Clean living spaces and laundry thoroughly throughout treatment.

When to Seek Professional Advice

Ring worm usually responds well to treatment, but complications can occur:

• Rashes that spread rapidly or cover large areas
• Severe itching or signs of a secondary bacterial infection (pus, swelling, pain)
• Infected pets that don’t improve after 2–3 weeks of treatment
• Any sign of systemic illness—fever, chills, fatigue—alongside skin changes

If you’re unsure about your symptoms or your pet’s condition, speak to a doctor or veterinarian right away. Prompt care prevents worse infections, protects other household members and helps you avoid passing ring worm back and forth.

Key Takeaways

• Ring worm is a fungal infection—not a worm—that pets and people can share.
• Transmission occurs via direct contact or contaminated environments.
• Treat both you and your pet fully to stop the cycle of infection.
• Maintain good hygiene and clean your home rigorously.
• Use a free, online symptom check, using the doctor approved Ubie Symptom Checker to see if your symptoms fit ring worm.
• Always speak to a doctor or veterinarian if you suspect serious or life-threatening complications.

Staying informed, vigilant and proactive lets you and your pet get back to healthy, itch-free days—without passing ring worm in circles.