What could cause burning skin and a rash in the groin area?

Fungus: Burning and rash in the groin could be caused by yeast or rungs infection. Fungus has a sharp border with scaling amd yeast has small red pus like spots in an irregular shape. Mild cases are treatable with cream. More extensive cases may need oral drugs such as Diflucan (fluconazole) or ketoconazole.

Fungus: Start with a trial of topical Lamisil (terbinafine) or lotrimin twice a day for 2-3 weeks.