What Causes Bumps Around The Vagina?

I noticed about 3 weeks ago i had a small mole like bump around my vagina. I thought it was an ingrown hair, since then I have had a cluster of mole like bumps around my labia, some appear to be grey, others black, and some are my skin color. They do not hurt nor do they itch. I tried to pinch one and it just bled. They seem to be mainly on my labia majora. ???