system
Given the following post, respond as if you're commenting on Reddit:
human
I burned my finger on a hot pan on my stove. What is the liquid that is inside the blister? If I don't pop the blister, where does that liquid go?
gpt
It's filled with, get this, "blister fluid", which is mostly similar in chemical composition to serum/plasma.  If the blister doesn't pop, the fluid just get reabsorbed.  

Blister fluid is *probably* serum that's lost some of its verve through the heat of the burn.  It contains very low amounts of immunoglobulins, and about half the complement you'd normally see in tissue where fluid has migrated.  As complement at least shows a lot of heat lability, the biologically extreme temps within the burned tissue is thought to denature some of these proteins.  It's assumed to get to the burned spot through normal diapedesis, which is the migration of non-red-blood-cell-blood components through the gaps between vascular cells.