Eli5 how does decompression illness kill you?

Question

Eli5 how does decompression illness kill you?

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Answer 1

I had an accident at a dive last year. Hands got numb, feet too. Before getting to a decompression chamber it had started spreading to my neck and head. Was quite a surreal feeling. I had to do two rounds of that chamber, very grateful for how well it worked but I never want to do that again…