What does a ringworm circle look like?

The fungus grows outward across the surface of the skin, so the outer border may be redder, rougher, or more raised than the middle. One patch can join another, and the centre is not always clear. Eczema, psoriasis, allergic reactions, and other rashes can resemble this pattern, so appearance alone cannot confirm ringworm. Scratching may add broken skin or crusting.

Keep the area clean and dry, avoid scratching, and do not share towels, clothing, or sports equipment. A clinician or pharmacist can help choose an antifungal treatment based on the body site and appearance. Use the product for the advised course, even if the edge settles early. Do not apply a steroid cream by itself to an undiagnosed ring-shaped rash, because it can mask or worsen a fungal infection.

Arrange medical advice if the rash is on the scalp, beard area, face, nails, or genitals, or if it is spreading despite treatment. Seek prompt care for marked pain, pus, fever, or rapidly increasing swelling. People with diabetes, reduced immunity, or repeated episodes may need a more specific assessment and treatment plan.

Does this border look consistent with ringworm? Should the skin be sampled? Which treatment suits this location? How can I reduce spread to people at home?