I have had so much nausea since I got the RSD in my left ankle...more in the past few months but we have hopefully found the reason for that. I know that nausea/vomitting is how I react to pain and I certainly have a lot of THAT since I hurt my ankle. If you haven't had any changes in meds, maybe that could be it. Or maybe it is something completely seperate like my increase in nausea and vomitting the last few months has been. Have you seen the doctor about it?