I can't post anything specific.... but I do recall reading that it can be genetic in some cases. My half sister had it, and our father had many nerve pain issues, and in hindsight, of what I remember of his problems, I think he probably had RSD also, but unsure. He passed away over 20 years ago, and my half sister has passed away too.

Since it may run in my family, it did stick in my head, and I did ask the Dr. I saw at Cleveland Clinic. She said it can - but in the majority of cases it does not. According to her, they have no clue why it would be genetic yet and was not sure anyone was studying it - or if it was just being casually observed and noted.