Vagina pimple?

Sometimes I get a singular pimple on my vagina, on the lip, and it hurts for a bit but I don’t recall the time it takes for it to go away or anything. I mostly notice it when I use the bathroom or something and I’m wiping. Does anyone else know what this is, or have the same issue? I wouldn’t say it’s common but I’ve noticed one here and there. They look like regular, red bumps kinda like a mosquito bite.