What Causes Itchiness Around Anus And Near Vagina?

hi. i have itchy skin around the anus and up the perineum towards the vagina. its quite dry. but it gets really itchy when its dry or moist? also i have a few small flesh coloured lumps at the back of my vagina-just inside. it worries me. I have only had one sexual partner, my husband and neither of us have sti.