What is ringworm?
Ringworm (tinea corporis) is a fungal skin infection — not actually a worm. The name comes from the ring-shaped rash. Common in athletes, children, and warm humid climates.
Same family of fungi causes athlete's foot, jock itch, and scalp ringworm. All respond to similar antifungal treatments.
Do I have ringworm? Common signs
If most of these describe what you're experiencing, telehealth may be a good next step:
What causes it
Dermatophyte fungi. Spread through direct skin contact, contact with infected animals (especially cats), or contaminated surfaces (gym mats, towels, clothing).
Is it contagious?
Yes. Contact-spread person-to-person, animal-to-person, or via contaminated objects.
If the center is clearing and the edge is raised — it's almost certainly ringworm.
Can it be treated online?
Routine ringworm is easy to diagnose by photo. Extensive infection, scalp involvement (tinea capitis — needs oral treatment), or immunocompromised patients need in-person care.
How ringworm is treated
Topical antifungals twice daily for 2–4 weeks: terbinafine (Lamisil) cream — most effective. Clotrimazole, miconazole, ketoconazole also work. Continue for 1 week after the rash clears. Scalp ringworm needs oral antifungals.
Self-care while you wait
- Keep affected area clean and dry
- Wash and dry separately from non-infected family members' laundry
- Don't share towels, clothing, bedding
- Wash hands after touching the rash
- Treat pets if affected (vet)
- Wash sports equipment regularly
How long does it last?
Usually clears in 2–4 weeks of consistent topical treatment.
Frequently asked questions
Is it really not a worm?
Correct — it's a fungus. Old name reflects the ring shape, not the cause.
Can I get it from my cat?
Yes — pets are a common source. Cats can carry without symptoms; bald patches in their fur are suspicious.
Why does it keep coming back?
Often: untreated reservoir (pet, family member, gym), stopping treatment too early, or it's actually a different rash.
Same fungus as athlete's foot?
Yes, same family. Same treatments work. You can self-spread between body areas — wash hands after applying cream.
When can my kid go back to school?
After 24 hours of treatment, with the rash covered.
