If you get too cold the temperature icon will flash and your guy will start to shiver, This has recently happened to me while out joyriding in a boat, resulting in a cough and blood loss, though it seems to have stabilized at 5999, Currently raiding hospitals in the hope of finding antibiotics.

Happened to me also, today and yesterday Both times I was no where near any airfields but when I logged back in I was on kamenka beach with all my gear

:)

I hope it isn't a bannable offense as I am currently running my guy with Face93_camo2 (for 3 days now) Will let you know if I do get banned :)