It feels as if there's a tiny ball inside the bump
I gotten this twice If its what Im thinking it is. They are too thick to pop and ive actually used a razor to nick it just enough to get the stuff out, though i dont suggest that method due to infections that could arise but i had havent had that happen because i sterilize the razor and area with alcohol. I sometimes have to repop it using the same way to get everything out.
May be a Bartholin's cyst