system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:what's the clear liquid in a blister? And is it safe to pop a blister?

*SOLVED* Is the clear liquid just water?
Thank you all for the replies :)
gpt
It’s called serum. It comes from other tissues surrounding the injury and actually acts to protect the injured area. Popping the blister will remove this protection as well as create an opening to the injured area, where pathogens can get in and cause infection. So it’s best not to pop it, but there are some cases where it should be popped. Like if it’s in an area where you are sure to ‘accidentally’ pop it anyway. Better to lance it and safely care for the wound at home than to pop a foot blister while you are hiking or something.