Are Burning Blisters On Vagina Curable?

I have had what feels like masses or blisters in my vaginal region for what i would have to say has been a couple of years not I never paid them any mind because they caused me little to no pain and would come and go as they please. Lately thought they have been hurting and in the past couple of weeks I have seems to have what feels like carpet burns or road rash in that region as well which is causing me great discomfort because I feels like Im pouring Alcohol in an open wound whenever I urinate I have taken multiple STD test and they all have come up negative what else could this be and is it cureable