What are these little things on my body?

So I get these little things on me all over my body, not many but they appear anywhere and everywhere, theyre not restricted to one area... 
They dont hurt, theyre tiny, theyre not noticeable to other people either. But when I do notice one I'll scratch it and I can pop it super easily like a whitehead/ blackhead.
What are they? Anyone know? I font think theyre actual zits at all, they dont act or look like them really