In the beard and on the face, ringworm is more likely to be a subtle, wavy or serpiginous line as shown in the photo. A groin rash that is spreading onto the thighs is highly suspect. Fungal scalp rashes are fairly uncommon in adults and are characterized by light scaling, inflammation and broken hair. Diagnosis Office diagnosis of ringworm is simple and rapid. A light skin scraping from the border of the rash is treated with potassium hydroxide then examined under the microscope.
Fungal elements stand out against the cellular background.
If the rash is accessible and not too large, almost any antifungal cream will work. Other prescription formulas are marginally better but have more convenient twice a day application. Treating for at least one week after the rash appears gone is recommended to prevent recurrence. If the rash is extensive or inaccessible, systemic oral treatment can be used.