My mom had a condition in which she bruised easily. I don't remember what it was but she had bruises everywhere and never remembered getting a one!
it probably didn't hurt at the time you got it or you had your mind on something else and didn't realize you hurt yourself
O that happened to me a few days back, everyone sees the patch ask how I got it, and I have no clue!
Good question ;)
A Ture Otaku >_<
OHH I do that all the time! like last week i got a black eye and i didnt feel it. (turns out my mom saw me do it) i walked in to the door (the side) and it didnt hert so i never notest. and when i went to rub the crap outs my eyes IT HERT.
adrenaline or alcohol covers the pain of impact, but when it wears off, you feel it