Ringworm in cats
Ringworm is a fungal skin infection, not a worm. It's contagious to other pets and people.
Last updated: October 2026 · 2 sources · see sources
Signs to watch for
- Round patches of hair loss
- Scaly skin
- Broken hairs
Trouble breathing, collapse, repeated vomiting, not peeing, or a seizure that lasts more than a few minutes needs a vet right away. See when to see a vet.
How vets diagnose it
A Wood's lamp, fungal culture or PCR test on hairs. [2]
How it's treated
Oral antifungal medicine, medicated dips or shampoos, and thorough cleaning of the home. [2]
Medicines your vet may mention: Itraconazole, Terbinafine. We don't list doses; your vet will decide what fits your pet.
What it costs to diagnose and manage
| Item | Typical US price | Src |
|---|---|---|
| Diagnosis (exam and tests) | $100–$300 | [1] |
These are typical US ranges from the sources listed. Your pet's costs depend on how severe things are, the tests your vet recommends, your pet's size and where you live. Ask your vet for a written estimate.
Outlook
Most cats recover fully, though it can take weeks to clear. [2]
Common questions
What is ringworm in cats?
Ringworm is a fungal skin infection, not a worm. It's contagious to other pets and people.
What are the signs of ringworm?
Common signs include: round patches of hair loss, scaly skin, broken hairs.
How do vets diagnose ringworm?
A Wood's lamp, fungal culture or PCR test on hairs.
How is ringworm treated?
Oral antifungal medicine, medicated dips or shampoos, and thorough cleaning of the home.
How much does ringworm cost to treat?
Diagnosis (exam and tests): $100–$300. Costs vary with severity, tests, your pet's size and where you live.
Related
This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.