Since OP isn't responding, I'll add that I completely lost feeling in the nose about ten years ago by staying outside in −45°C for way too long, and it never recovered. The front half feels like it's permanently under anesthetic. Other than that, it looks and works as it always did.
I didn't even notice anything until three passerby in a row said that my nose looks funny and I should probably do something about it ASAP.
You’re right, the sensation never came back for me. It’s the outer half that was exposed to the side of my boot.
My feet were too cold to notice that water got inside my boot, then by the time my toes were freezing there was no way my nerves could let me know. I only spent around 4 hours like that, but it was enough. It wasn’t even painful until the moment it went into the shower so I had no idea what was going on even once I got home into a warm house. It’s sneaky stuff.
I do remember being creeped out by how white and immobile my toes were. I knew that wasn’t great, but I didn’t think they’d literally begun to freeze. I’m a lot more careful now.
I didn't even notice anything until three passerby in a row said that my nose looks funny and I should probably do something about it ASAP.