About two days ago I noticed a flesh colored blister like bump on my pubic bone, inside the hair by my leg. It burst today and is red. What is it?

Blister on leg. Could be blister - irritation from clothes, or folliculitis infection of hair follicle, rarely herpes ( hurts a lot and it usually crusts). Since burst can get infected can try OTC bacitracin 2 x a day wash with soap and water, cover with gauze ( not a band aid it makes things worse) and tape, also destin may help as zinc is antibacterial. Use gloves,wash hands after, heck for herpes f/u w/MD.