My questions - Have both feet been cold and purple for a while when you put them down or is that new since your injury? Do both feet do it to the same degree? Have you had any vascular workup to check veins and arteries?

It seems IMHO that people can have poor circulation or other neurovascular challenges that may not be originally caused by CRPS but that CRPS makes worse. I have Raynaud's and had it a long time before I ever even heard of CRPS. Both my feet turn colors but it is now much, much worse in the injured foot whereas before both feet did everything the same and recovered the same from cold, heat, etc. Some of my initial symptoms were vascular, temperature and color change related to position that were NOT symmetrical. The severity difference foot to foot is what pointed to a nerve issue instead of a systemic one.

Littlepaw