In which part do you have, use jathyadhi taila for external application, avoid frequent exposure to water

Try over-the-counter antifungal ointment, lotion, powder or spray. The rash may clear up quickly with these treatments, but continue applying the medication twice a day for at least 4 weeks after resolution of infection... Try to stay dry and maintain hygenic measures and Consult nearest dermatologist for clinical examination they will do the needful.