Stephanie:
Many people have persistent dermatitis/sensitive skin in the genital region.
TemovateTemovate
Temovate e
Temovate emollient can't be used chronically, but weaker
preparationsPreparation h hydrocortisone, like 2.5% hydrocortisone or
desonideDesonide
Desonide topical cream 0.05%, can be used off and on indefinitely. I'd wash with a mild soap like Basis or Purpose, and get a prescription for one of these creams, or another like it. In my experience this annoying but noncontagious rash generally peters out when kept under control.
Good luck.
Dr. Rockoff