TL;DR: Key Takeaways
- Ringworm = expanding ring with clear centre; eczema = diffuse dry patches, no active edge
- Ringworm is contagious; eczema is not
- Steroid cream on ringworm makes it worse (tinea incognito)
- Antifungal cream on eczema does nothing useful
- If self-treatment for 2 weeks makes it worse, you probably picked the wrong one
Side-by-Side Visual Cues
- Ringworm: sharply-defined round or oval patch with a raised, scaly, actively advancing edge
- Ringworm: centre often looks clearer than the rim
- Eczema: symmetric, ill-defined patches on inner elbows, backs of knees, wrists, ankles
- Eczema: dryness and cracking dominate; no expanding ring
- Both itch — itch alone cannot separate them
The Steroid-Cream Trap (Tinea Incognito)
If a rash was treated as eczema with hydrocortisone or a stronger steroid and it initially calmed down but then spread outwards in a less-defined shape, suspect ringworm. Steroids suppress the redness that would otherwise show you the fungal border, so the infection expands silently. Stopping the steroid and starting an antifungal is the fix — see a clinician if the pattern is unclear.
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Where Each Typically Appears
- Ringworm on body (tinea corporis): trunk, arms, thighs — any warm-moist area
- Ringworm on feet (athlete's foot): between toes, soles
- Ringworm on groin (jock itch): inner thighs, sparing the scrotum
- Eczema: inner elbows, backs of knees, wrists, hands, eyelids, neck
- Eczema on the scalp is usually seborrhoeic dermatitis (dandruff), not ringworm
Treatment Direction
Ringworm: clotrimazole, miconazole or terbinafine cream twice daily for 2–4 weeks, and continue for a week after it looks clear. Eczema: fragrance-free moisturiser at least twice daily, plus a short course of low-potency topical steroid on active patches. See our fungal rash vs eczema guide for the full decision tree.
When to See a Clinician
- Rash keeps spreading after 2 weeks of the right cream
- Scalp or nail involvement (needs oral antifungal)
- Immunosuppression (chemotherapy, biologics, HIV)
- Widespread body involvement
- Blistering, pus, fever, or facial swelling
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Related reading: Fungal rash vs eczema · Fungal infections hub
Frequently Asked Questions
Ringworm is usually a single (or few) sharply-bordered ring with a clearer centre and a scaly, slightly raised edge that expands outwards over days. Eczema is more diffuse, symmetric on flexures (inside elbows, backs of knees), and has no active advancing border.
Yes — ringworm is a fungal infection spread by skin contact, shared towels, gym mats, and pets. Eczema is not contagious. If a household member develops a similar rash, ringworm is far more likely.
No. Topical steroids reduce inflammation but let the fungus spread — a picture known as tinea incognito. If eczema cream has made a rash look worse or spread outwards, ringworm is likely and needs an antifungal instead.
Over-the-counter clotrimazole, terbinafine or miconazole cream applied twice daily for 2–4 weeks clears most cases. Widespread, scalp, or nail involvement needs oral antifungals from a clinician.
See a clinician if a ring-shaped rash keeps spreading after 2 weeks of antifungal cream, if it involves the scalp or nails, if you're immunosuppressed, or if you cannot tell the two apart from photos.