They are too big for you I bet.
I just went through this with Crispi Lapponia 11.5's. I normally wear an 11 wide, those were out of stock this summer so I sought out a good deal on 11.5's. Felt like they fit great, BUT I felt some pressure on the top of my toes that quickly went away every time I wore them.
Fast forward to the top of a mountain in CO a couple weeks ago, boots felt great. But at different specific times I felt like my big toes were breaking, lasted about 2-3 minutes while standing still. Always kept full movement, boots still felt very comfortable, I wasn't feeling any pressure at all from the boots ever.
Then we get home and I wean myself off my steady diet of ibuprofen that I always get on when I'm in the mountains. Within two days both big toes go completely numb (Friday morning after getting home Wednesday). I go to doc on Monday, both are still numb but the right one is having random pains. Circulation/color is good. Doc tells me I probably compressed some nerves and gives me a steroid. That was last Monday, today, week and half later, they are almost 95% back to normal I'd say.
All my research on it leads me to believe that the initial pressure I felt from the crease over my big toes when I would step didn't actually go away - it just numbed my toes and beat the crap out of them. Never bruised, but just repeated pressure damaged nerves. That crease in the boot wouldn't put pressure on my toes if it were further back and lined up with the bending of my toes/foot.
I have 11 wides and 10.5 wides coming today from Crispi to try out.