What Do Lumps Around The Vagina Indicate?

For the last year and a half now, every month or two I'll randomly get some lumps around my vagina/genital area. They're usually at the top right/or left of my "labia majora". I'll only get one, sometimes two, at a time.
They feel to be hard under the skin type lumps. I have popped a couple and it squirts out yellows/green pus and sometimes what seems to be a core. They are about 2-3cm in width, and they get very sore and painful and get very inflamed. The more I touch, the bigger they get. I haven't had one appear in a couple of months, and now one has showed up again. It's about 3cm, very inflamed and red. It feels like a ball under my skin, I tried to squeeze it because it looked like there was a tiny bit of yellow/white at the top but it won't pop. I tried to put a sterilised needle into the top of it to try puncture it and squeeze it but that won't work either, it hurts too much. I don't have any issues urinating and these lumps donot bleed. Please help me out. Thanks so much