Hi there. Your history my dear prior to the occurence of the rash
is a touch inadequate. How old would you be? Are you sexually active & if so partner/partners with similar itching/use of protection during sex? It is possibly either a fungal infection
or contact dermatitis
or even possibly trichomoniasis
depending on your sexual history/contact history. Please do fix an appointment with yor GP/dermatologist
as a scraping/hangin-drop test may be the order of the day. I'm afraid any online doc can only suggest a remedy when the case is clear. If you chose to use our premier package'ask-a-doctor' , would be happy to assist you further but please revert with answers to the questions posed & or photographic evidence to assist us. Cheers & Good luck!