I have a small blood filled bump protruding on my backside on my panty line.  It is about the size of a very large kernel of corn--above the skin.  It was painful and it did bleed, but I do not believe there was puss in it.  Can you please advise if and when I should go to a doctor?
Hi. The site, nature and bleeding without pus of this bump makes me think that you should consult a Doctor ASAP. This may be a hemangioma-like thing called a granuloma myogenic. Needs a care under Doctors supervision.