I used to get these years ago when I was in my teens. But not happened for quite some time! Thing is though, even though they're in places that I'm
able to reach myself (like my forearms, chest, legs), I used to bite my nails right down, and I hadn't had any pets like cats or dogs since I was
12....
Unless one of my family sleepwalks and scratches me in the night then I'm clueless! Must have been with enough force because they'd be raised and
slightly swollen by morning. Just glad it's not happened for many years
Which reminds me (sorry if it is OT?) of something that happened a while back. I put it down to rubbing of a rucksack I had some weight in one day.
Didn't notice if it had made any marks (wasn't paying attention mind), but I hadn't noticed that day. Next day, I woke up and when I looked in the
mirror, I noticed that, if it were my bag, me or something else, I've no idea, but I had what resembled three small triangle imprints on the front
side of my shoulder - kinda in the pattern of the olympic rings, if that makes sense?
I do realise that it sounds rather far fetched, and no, I didn't get a picture. This was years ago when we couldn't afford decent cameras and the
disposables had all been used up, gerrr!

absolutely gutted. But thanks, this thread had just re-jogged my memory of that