Hi Pete,
First, I think it's great that you are doing some research on how massage affects RSD. your curiousity and care reflects that you are a conscientious massage therapist.

Often, when I have tried to massage my own foot, ankle, and lower limb where the RSD is, it can cause a flare of burning pain...i think if the massage is vigorous enough it makes the nerves "angry....."
I have noticed, though, that when i massage very gently in an upward motion it helps somewhat with the swelling and doesn't flare up the pain as much...
Something important to note, though, is never ice an RSD area, such as a limb, on the back, etc. as this further constricts the vessels and is not a good treatment for RSD.
I hope this helps!

Hope4thebest