I have a painful pea sized lump on the front of my outer vaginal lips. It is too deep to be an ingrown hair and not in an area that I shave or wax. It feels like when you bruise the bone, which it what i thought i had done but i have only just discovered it is a lump. There is no redness on the surface and i have just had a full STD test for everything and the results were negative. I have noticed it over the past week, but not before. Any ideas on how to get rid of this?