What happens if ringworm is not treated?

Ringworm is a fungal infection, not a worm. An untreated patch may gradually expand, develop a more noticeable edge, or become increasingly scaly and irritated. Read about [Skin Rash](/symptoms/skin-rash/) and [Scaly Skin](/symptoms/skin-scaling/) for related features.

The fungus can transfer through close skin contact or shared items such as towels, clothing, bedding, hair tools, or sports equipment. It may also move from one body area to another when an affected patch is scratched and then another area is touched. A rash that looks like ringworm can have other causes, so confirmation matters when the appearance is unusual or treatment has not helped.

Arrange an assessment and follow the recommended course carefully. [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/) may be suitable for some localised skin infections, while [Oral Antifungal Treatment](/treatments/medical-dermatology/oral-antifungal-therapy/) may be considered when infection is extensive, recurrent, or in a site where creams are insufficient. Keep the area clean and dry, wash hands after touching it, and do not share towels or clothing.

Avoid using steroid cream alone on a suspected fungal rash unless a clinician specifically advises it. Steroids can change the appearance and allow the infection to continue, making assessment more difficult.

Seek medical advice promptly if the rash is spreading quickly, painful, oozing, crusted, or affecting the scalp, beard area, nails, or a child. Arrange review if it does not improve with the advised treatment or if several household members have a similar rash. Fever, marked swelling, or feeling very unwell needs urgent assessment.

Ask whether the appearance fits [Ringworm](/conditions/ringworm/), which treatment is appropriate for its location, how long to use it, and when you should expect improvement. Ask how to reduce spread at home and whether close contacts or pets need assessment.