Hi Liz,
It certainly is a 'chicken and the egg' situation. For me my RSD/CRPS was well and truly established before I ever had a tourniquet applied and certainly know many who have RSD/CRPS who have never had a tourniquet anywhere near them

I am certain that the use of a tourniquet is surely going to complicate matters ( apart from the fact it hurts like crazy )

The interruption of blood flow to already compromised tissue can't be good in the long term even thought the resultant pain relief from a bier block may make it seem to be a successful procedure.
Cheers Tayla