Weirdness.....down there

Alayjah
Okay so I'm a young teenager and my hormones are fairly stable to get through the day so I don't think they are a contributor to this problem but, I always tend to get large, red, blood filled bumps on the outer part of my vagina. It's clean always cuz I'm a neat freak, I'm a virgin and i don't shave down there very frequently (I've got no one to please lol.) But I'm concerned cuz they show up suddenly and they hurt and they have no head, like a pimple. Is this normal for someone my age? Can someone help me understand this?