Want this question answered?
The simple answer is the partial pressure of nitrogen being breathed. The deeper a diver goes, the greater the partial pressure of nitrogen in the air being breathed due to the increased pressure from being deeper. There is also a debate as to whether oxygen contributes to narcosis. But for a more indepth answer ... I don't think anyone really knows why it happens and last I knew there were different theories out there. Perhaps some medical people can jump in here some.
Scuba diver's diseases include decompression sickness, pulmonary embolus or emboli, oxygen toxicity, nitrogen narcosis, and other afflictions associated with scuba diving, working under different pressures, at sea, or underwater.
Nitrogen.
how does decompression sickness effect the body
Scuba divers who surface too quickly after a deep dive are prone to decompression sickness.
Nitrogen is extremely helpful to plants because it is a vital nutrient they need. When nitrogen enters the blood steam of a human or animal, it can cause decompression sickness. On the whole, life would not be possible without nitrogen.
helium
The Bends.
The Bends
It may be a painful condition, especially as nitrogen bubbles invade the joints; persons stricken may walk stooped over in pain
Decompression Sickness-rapid reduction of the atmospheric pressure
It is any illness that is related to a release of pressure from the body such as barotrauma .. baro (pressure) trauma (injury). It includes decompression sickness, but it is not limited to decompression sickness. It is also not limited to diving even though that is what is mostly thought of when discussing decompression illness or DCI.