How does decompression sickness occur?

Answer 1

There is no guarantee that you can prevent decompression sickness since everyone has an individual susceptibility to it. But there are things that can be done to lessen your chances and some are not well taught. One very big thing that can be done is to minimize your exertion both before during and after the dive. So when carrying your gear, do what you can to reduce your "work" and activity. Also, hydration is a big factor, so stay well hydrated. Of course, there are the obvious answers such as dive "conservative" by staying well within recognized time limits. Also, do safety stops. Safety stops can drastically reduce bubble formation and your risk of decompression sickness. I added 2 links that discuss this topic in more detail which include strategies to minimize decompression sickness.

Answer 2

Too much nitrogen in your body. Air bubbles remain for hours after diving and without being cautious can make you sick or kill you.

Answer 3

One may get decompression sickness (DCS) most commonly as a result of underwater diving. The symptoms of DCS include rashes, joint pain and mobility issues.