Boils can be caused also by a severe allergy to something like perfumes. wear cotton and stay away from polyester and nylon underwear. If you have been sexually active you may have a STD . See a doctor and get this checked out.
make sure your not shaving alot down there as that can cause boil type spots. as its all over your body aswell i would go to the docs, im sure theres something they can o. also try looking on the embarrassing body website, im sure theres something on there