i have been experiencing some itching and burning sensation around my vagina lately. Sometimes when it gets intense i can feel the itching inside my vagina. I also use to get these bumbs/ boils on my vagina and they really hurt. They look like huge pimples and burst after some days. This has happened maybe 3 or 4 times but i havent had the boils in over 3 months. the itching continues though. What can be the cause?