I have a small bump on my right outer labia. This happens every so often. It's not painful but it's tender to the touch. I'm no very active sexually and every time I am tested for diseases the tests come back negative and I am healthy. Im wonderong what causes this bump and if I should be worried about it? My gynecologist thinks I'm paranoid sometimes (because I always test healthy) so I don't want to go in for another test if this is a common/harmless issue. Thanks