Hi goBlue,
CRPS or not? who knows? Can it be solved by getting rid of pain contributor or potentially get worse? It is sadly for us an unfathomable mystery.
There is a CRPS spectrum but I have been told by my PMR doc who is head of a rehab in Houston and head PMR of a tertiary referral center that some people get a somewhat CRPSy looking response every time they have surgery. He says in these people they watch a few months then it quietly goes away without much fanfare or intervention. I would never try to say you do or do not have CRPS but please don't pathologize or worry excessively about normal post op reactions. Those are also a spectrum and some people discolor when not weight bearing and everyone who has foot surgery has swelling for weeks, sometimes a year or more. Ankle sprains are known for causing a cold ankle and foot, no lie. Feet, being at end of the circulatory chain just get the brunt of it all.