A little lady, roughly three inches high. Doesn't shave. Pointy twig hands and headpiece. Those sharp, random nerve pains you get from time to time? That's her. I wish I could say the attacks were indeed random, but unfortunately it's personal. It's very, very personal. You know what you did.
Your best bet is to get a cat. If you have a cat, and it's not catching and devouring the twig-sprite that keeps stabbing you, well. You've got a lazy cat. Adopt another one. And another one. And another one. Cats are awesome. Eventually one of the cats you adopt will kill and devour the spiky little lady, and you'll find a few random dried twigs on the carpet by your bed. Maybe a little, bloody severed arm. Your cat is just showing you how much it loves you, by trying to bring you food. You'd better eat it- do you want your cat to feel the harsh sting of rejection from the one person they care about the most? Damn right you don't. Just eat it. Quick. Don't think of it as a tiny human arm. It's... it's a pretzel stick. Wrapped in deli meat or something. Just jam it in your mouth and chew. A pretzel stick. Do it. Stick it in there. Chew. Swallow.
Oh dear god you monster. How could you? You're a cannibal now. It doesn't matter how small it was, that was still a human arm. Dear god. How will you ever look your family in their eyes again?