The conditions fungi like best are warm, moist and airless areas of skin such as the groin
A red rash
then develops in the groin
, usually with a definite edge or border. Both groins are commonly affected. The rash often spreads a short way down the inside of both thighs.
You can buy an antifungal cream from pharmacies, or get one on prescription. There are various types and brands. For example; terbinafine, clotrimazole, econazole, ketoconazole, miconazole, and sulconazole.