I recently noticed a small, kidney-bean shaped lump just on the inside of my labia majora. It does not hurt, itch, or is bothersome at all...its just there. It feels like a blister, and with a little effort, I was able to pop it and nothing but blood came out, no pus or any other type of fluid...just blood. And a lot of it too. I don't think it can be an STD because my partner has been tested recently for everything and his results came back negative, and he is also the only guy I have ever had sexual intercourse with. I've been doing some research and have found that it could be a cyst, but I've read that cysts, when popped or drained, excrete a white-cheesy type of material. Again, this lump that I have only excreted blood. And it still does not hurt at all. Any ideas what this could be? Is this just a blood blister...if so, how did it get there? I also do shave, but haven't in a couple weeks, so could it be an ingrown hair? But again, no pus came out. Any insight would be helpful. Thank you.