No, not the Simpsons cartoon, but my dd! She seems to be very itchy and her back is covered in scratch marks. The other day she scratched her arm so much that it bled and looks quite nasty now. I've checked her bed and can't see anything crawling or hopping in there. I've changed her sheets and we haven't changed our washing powder at all, we use non-bio anyway. So does anyone have any idea as to what it can be?