When someone is going into a coma and the brain is swelling, why can't they cool it or ice it to stop the swel

Question

You can ice a swollen joint, a buise, or a bump to bring the swelling down. why when a person starts slipping into a coma and or the brain starts to swell they can't figure out how to chill it without damage?

Answer 1

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Because the brain is a very sensitive tissue. A few degrees too hot or cold can kill someone.

Answer 2

Because brain tissue has such a high content of water that the formation of ice would magnify the damage even more.

Controlled hypothermia has been tried, ask the doctors about this.