Characteristics of ringworm

The rash may start as a small patch and enlarge outward, forming a roughly circular or ring-shaped area. The border can be red, raised, flaky, or more irritated than the centre, although appearances vary and the centre is not always clear. It can affect the body, scalp, groin, feet, or nails. Other conditions can resemble it, including eczema and psoriasis, so a visual match alone cannot confirm the cause. Learn more about [Ringworm](/conditions/ringworm/), [Skin Rash](/symptoms/skin-rash/), and [Scaly Skin](/symptoms/skin-scaling/).

Keep the area clean and dry, wash hands after touching it, and avoid sharing towels, clothing, hairbrushes, or sports equipment. Do not scratch or cover it with an occlusive dressing unless advised. A clinician or pharmacist can guide you to [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/); scalp, nail, widespread, or persistent infection may require [Oral Antifungal Treatment](/treatments/medical-dermatology/oral-antifungal-therapy/). Use treatment for the advised duration even if the surface begins to look better.

Seek assessment if the rash involves the scalp or nails, spreads quickly, affects a child, or does not improve with appropriate antifungal care. Prompt review is needed for pus, increasing pain, fever, facial or eye involvement, or a weakened immune system.

Does this look like a fungal infection, or is testing needed? Which areas of the household should be checked? How should I prevent transmission and know that treatment is working?