 Some divers suffer from hyperbaric arthralgia (compression arthralgia) during descent and trimix has been shown to help symptoms on compression.Helium dissolves into tissues (this is called on-gassing) more rapidly than nitrogen as the ambient pressure is increased.A consequence of the higher loading in some tissues is that many decompression algorithms require deeper decompression stops than a similar decompression dive using air, and helium is more likely to come out of solution and cause decompression sickness following a fast ascent.