Those blue things are tiny arachnids known as "Demodex brevis," and they live in your pores right now. Yes, in your pores. Researchers discovered that precisely 100 percent of people examined were home to massive colonies of microscopic face spiders.
Whoa, hey -- stop clawing at your skin; you need that to live.
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You'll just make the spiders angry.
As you can imagine, some people react poorly to mites holding massive raves all up in their grills. It's now thought that a common skin condition called rosacea, which leads to rashes and inflammation, might be caused by an immune reaction to these scaled-down Lovecraftian monsters. But, hey, life isn't exactly rosy for our face friends, either: They don't live long, so nature never bothered to give them an ass. They stick around just long enough to gorge themselves, lay eggs, and die. So, that's sort of an upside: At least the millions of arachnids living in your face aren't using it as a port-a-John.
Oh wait, it says here that they just store all that poop up, and, when they die, it releases all at once, all over your face.
Manure: fertilizer for your skin, by your skin.