Spots??? (UPDATE)

So I’m pretty lucky with my skin, in the sense that I don’t have any pimples or warts or anything, anywhere on my body.

However, I’ve recently noticed these. They’re on the back of my thighs, right under my butt. They don’t really itch, but i feel them. It’s to explain. Like there’s a slight itchiness but not enough for me to care about it.

And it’s not a big spot, like I wear denim short shorts and it’s hidden, they stop after my butt ends.

Is this razor burn? How do I prevent these from forming?

UPDATE: So it’s a day later, and they hurt. I can’t sit with shorts on on a hard surface or a scratchy surface (like carpet) and I think they’ve gotten worse too.

Is this just acne? Does acne hurt?

And why would I only be getting it on my lower butt?