Decompression sickness. en.wikipedia.org/wiki/Decompression_sickness Maybe you should learn to search information instead of asking it

Decompression illness, or DCI, is a term used to describe illness that results from a reduction in the ambient pressure surrounding a body. A good example of this reduction in pressure is what happens to your body when you're surfacing after a dive. DCI encompasses two diseases, decompression sickness (DCS) and arterial gas embolism (AGE). DCS, which is colloquially referred to as "the bends" ("getting bent" is the colloquial for experiencing DCS) is thought to result from bubbles growing in tissue and causing local damage, while AGE results from bubbles entering the lung circulation, traveling through the arteries and causing tissue damage at a distance by blocking blood flow at the small vessel level. Check out our channel to learn more! We also have a full host of resources on decompression illness on DAN.org.