There are no stages in RSD any longer. This doesn't follow a linear path from you having this, this and this from month 1-3 and then have this from month 2-6. Every person with rsd has multiple symptoms at any given time and they fluctuate all the time. No doctor or medical person who is up to date will even mention stages because there is no such thing anymore.
One great example is at the beginning it says the skin is hot and much later progresses to cold. Not true! The majority of those with rsd have the skin begin cold and stay cold. A minority start hot. See my survey results
here.
Hugs,
Karen