On my bikini line, between my pelvis and right leg, I hold a bump, what could it be?

I know that I'd had this entity along the crease between my leg and public area that looked approaching a scar for as long as I can remember. But since it started getting radiator and more humid, lately the thing have been risen and turned open-handed of brownish redish pink and hurts when my underwear line rubs against it.
Before, it looked close to a scar, but very soon it looks gross and painful sometimes.
Has anyone ever have something similar, and what is it?
My gyno has never mentioned the entity that looked like a defacement before, so if it be something woudln't she have said something at the time?
Just confused.. :(

Oh.. it's something like the size of a pencil eraser..
Answers:

Is it possible to lose 20 pounds by june 8th? what do i need to do?

ingrown hair(s)

Okay i enjoy to go bring birth control and the do a pap smear. i have a embarassign request for information.?

let your doctor know it is red and painful...I'm not sure at first I thought it be an ingrown hair or an abscess, but the more I read into your sound out, the more I didn't have a clue..

OMG PLEASE HELP PLEASE IM DYING HERE (please)!!?

okay, progress to googleand find a map of the endocrine system. there are clusters of lymph nodes surrounded by the pelvic region and sometimes they get an infection. if the pinkish brown bump is a apt bit under the skin (can move around and grasp under) in attendance is a chance i.e. all it is especially since it is greatly painful. I have that once and my doctor said it was a regular thing. however, if it doesn't turn away, keeps getting bigger, more itchy, you really should go to a doctor. a unfocused description of something i have deal with is not a diagnosis of your problem. otherwise, it is a adjectives thing and will bring back better in time!

I know this sounds strange but..?

It is from wearing jeans. The seam of the jeans rub against your skin.