I have developed a small grayish, slightly raised line on the back of my hand, about 1/4 inch long, that sort of burns when it is touched or brushed. It is not cut or burnt, in and of itself - looking on the web, it seems it might be a mild form or stage of scabies? Or something else? Looking more closely, there may be other lines elsewhere on the back of the hand, some curving but some straight, but not as raised - if scabies, earlier burrows, not active now?