Seems like you have developed Candidiasis
ie fungal infection
in the groin region....
Firstly, do not apply any kind of oil or moisturising creams over the affected are
Keep it clean and dry as far as possible
Wear cotton clothes and Undergarments ,so as to decrease the amount of sweating
Take daily bath.
you will need to apply topical antifungals (like clotrimazole
cream twice daily) over the affected area ...if there is itching, oral antihistamines are also required....Try this for a week,but if the preoblem persists ,then you will need a course of oral antifungals as well
hope it helps
Dr Geetika Paul