I am looking for all possible scientific explanations for unexplained scratches. I'm relatively certain there has to be a bug or two out there that can make these kinds of marks, but I don't know which ones or what they'd look like.
I'm not looking for a priest, an exorcism, or a lesson in spirituality or demonology. I'm looking for possible explanations for 'unexplained scratches' that exist in this universe, this dimensional reality, and is not of a spiritual nature.
I understand that sometimes bugs can crawl on you at night causing you to scratch in your sleep. I understand that skin dryness or sensitivity can exacerbate these marks as well. Is there an insect out there though that can leave a mark like this by biting? I know there are certain insects that have irritants on their bodies as well. Could any such insects cause scratch like marks?