Yeah it's extremely painful. I jumped into a frozen lake years ago and ran to a shower afterwards. Turned on the water, just slightly warm and it felt like my fingers and toes got smashed by a hammer.
A friend was a Vietnamese POW. The first torture done was to tourniquet his upper arms until they colored to black and then loose the bindings (repeatedly).
Returning circulation is much more brutal than it might sound.
Whe sometimes I sleep on my one of my arms and they go numb, when I reposition and I start to feel it it comes with immediate and excruciate pain that luckily dies in intensity after a few moments. I wonder if this is just compressed nerves or it’s the blood supply that was cut off.
ok that is terrible, but note that gently slowing circulation to arms or legs and then returning circulation is a simple theraputic action that has been used for millennia
Some spas have this if you’d like to mimic it mildly. Aire in London has a very cool pool from which you can go to a very hot pool. I really enjoy the pins and needles effect.
