How to treat boils quickly?

i have had this boil in the middle region between my thighs. i run every day for like 40 minutes, so i figure maybe friction or delayed bathing is the cause (after running in the gym i weight train for a while and then go for a bit of driving). but i need to treat it quickly because i can't run with that thing. and i have already lost 2 days. i want to be able to run!