i'm on liquid oxy for 'hardening of the arteries'. my doc told me that the body doesn't absorb 'too much oxygen' in the open air, that is to say, where it can vent, or breath it out, again. i have heard that it can relieve pain by saturating tissues that are not getting enough circulation. i have not found it to be very helpful for other kinds of pain, except headaches.
please have someone with you when you use it the first few times, to be sure you don't turn red, and maybe read up on it online.
Patient Safety Tip of the Week Archive
this scholarly paper recommends caution.
best wishes~
Gus