system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does everything hurt more when you're cold?

I was wearing sandals in cold weather, stubbed my toe and thought I was going to die - it hurt way more than when I'm just hanging out in a room-temperature place. Why is this so?
gpt
Things (well, things that aren't water) constrict when cold, becoming more rigid and inflexible. Impact injuries are softened if there's enough flexibility to spread the pressure of impact around (in an extreme example, a kevlar vest "spreads" the force of a bullet impact). In this case, if your toe were constricted and inflexible because of the cold, the force of stubbing it will be much more concentrated on where it hits.