In reply to PicosAdventures:
I'm guessing your big toe is not bent when trying them on. If so maybe get a tighter fit so you are forced to retract your big toe a bit. I think some Boreal boots are designed to accommodate this, though that's not necessary.
Obviously keep your toenails tightly trimmed.
There are lots of wider boots around so I suppose you just have to try them on and see what fits best. Though it's never an easy process and boots inevitably stretch and get bendier when broken in.