What Causes Itching Sensation On Anal And Vaginal Area?

Hi for the past one month th skin around my anus has been itching day and night and i recently went to the doctors and got prescribed proctosedyl. Have been applying it everyday for a week now but it did not go away. Now th insides of my anus as well as the lower portion of my vagina closest to my anus are itching as well. Will anti fungal creams work? Of not what else should i use? Thanks.