After a certain age, my body stopped notifying me every time I got a scratch or a small cut. I can injure myself brushing against doorways, leaning against walls and so on, and not notice the damage until much later.
I have often woken up with pains which were caused by things which had happened during the previous day, but which I didn't feel until morning.
It's almost as though in the morning, my sensory system does a reset, and scans afresh, and I only then get alerted to things which were actually there for quite some time.
If you don't find blood on your sheets, that would be a hint that your wound was there and scabbed over before you went to bed.
Edited by
IgorFrankensteen
on Mon 06/06/16 03:17 PM