Re: bump between legs
It sounds as though you have an abscess or abscess which already has a fistula. My husband had that when he was 19...and let it go as long as you have.
You need to go see your doctor and request to get referred to a anorectal specialist who can diagnose the extent of it properly. Either way, it needs to get excised so that it won't cause you any more problems.
It's all a matter of perspective!