Hi Kate, I think we are talking about 3 different things. When I spread to all limbs, chest, neck and back, I was diagnosed with generalized or full body RSD.
When Rsd went into pelvic region, colon, heart, lungs etc, was called internal RSD. I have heat radiating from these areas and HOT to touch on the skin.
RSD can go from sympathetically causing symptoms to independent pain-that is another area of the cause of symptoms. Usually after a year or so, our symptoms come from independent pain signals from the brain instead of the sympathetic system sending signals to the brain.
Hope this helps. Always thinking of you-please know we care. My love to you and your husband and children, loretta with soft hugs