Jock itch (tinea cruris)
Jock itch is a fungal infection of the groin and inner thighs. It causes an itchy, scaly rash — often with a raised, slightly worm-like border — that can feel hot and moist. It’s the same family of fungus that causes ringworm and athlete’s foot, and it thrives in warm, damp areas, which is why it’s more common in people who sweat a lot or wear athletic gear in that area. It’s mildly contagious and spreads through skin contact or shared towels and clothing, but it usually clears within about two weeks of consistent antifungal treatment.
Self-care products available in our shop
- Antifungal creams (e.g., clotrimazole/Canesten, terbinafine/Lamisil, miconazole)
- Antifungal powders to keep the groin area dry
- Moisture-wicking, breathable cotton underwear
- Apply the antifungal to the rash and 2–3 cm beyond its border, keep using it for the full time (usually about 2 weeks, even after it looks better), wash and dry the area well, change underwear daily, and don’t share towels or clothing.
Treatments our pharmacist can prescribe
For your information only: in Ontario, our pharmacist can assess this condition and, when appropriate, prescribe from the medications listed below. This information is provided for educational purposes — it is not an offer to sell. These are treatments that require a pharmacist assessment, and the right option is chosen for you.
Topical antifungals: Ciclopirox, Clotrimazole, Ketoconazole, Miconazole, Terbinafine, Tolnaftate, Undecylenic acid
When to seek further care: See a health-care provider if the rash hasn’t cleared after 2 weeks of treatment, keeps coming back, is spreading, or involves the scalp or nails — those need prescription oral antifungals and are outside minor-ailment scope. Also seek care if the skin becomes very raw, weepy, or shows signs of a secondary bacterial infection.