Can ringworm occur without a ring?

The rash may appear as a patch, an arc, several spots or a diffuse area. Fine scale, itch, a slightly raised edge or gradual outward change can be more informative than a perfect circle. Moist folds, the face, hands and scalp can produce different appearances, and darker or lighter skin may make redness less obvious. Steroid creams can temporarily alter the pattern while the fungus remains active. Because eczema, psoriasis and other rashes can overlap in appearance, a clinician may examine the border and test scale when the diagnosis is uncertain. See [Ringworm](/conditions/ringworm/), [Skin Rash](/symptoms/skin-rash/) and [Scaly Skin](/symptoms/skin-scaling/).

Keep the area dry, wash hands after touching it, and avoid sharing towels, clothes or grooming items. Photographing the edge over time can help show change at an appointment, but do not delay care if it is spreading. Use an appropriate [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/) only after checking the product and body site with a pharmacist or clinician. Scalp, nail, beard or extensive infection may require [Oral Antifungal Treatment](/treatments/medical-dermatology/oral-antifungal-therapy/).

Arrange assessment when a changing or scaly patch has no clear explanation, continues to spread, or fails to improve with suitable treatment. Seek prompt care for pus, marked tenderness, fever, rapidly increasing swelling, or a painful scalp patch with broken hairs. Ask for tailored advice if the affected person is very young or has reduced immunity.

Which feature makes you suspect fungus? Could this be eczema or another rash? Would a skin sample clarify the diagnosis? Is this body site suitable for cream? What should I do if the edge keeps expanding?