years ago on another forum there was a TOS {thoracic outlet syndrome} member that had a user name of cutter, I don't think she has joined here.
And the other forum had a crash so all those old posts are lost now.

Have you looked at our sister site also?
They don't cover the RSD medical part but addictions and self injury are covered..
Forums at Psych Central!
http://forums.psychcentral.com/forumdisplay.php?f=57

We do have some Mental Health forums here too, but no self injury section.
Mental Health Conditions
http://neurotalk.psychcentral.com/forum84.html

plus we have an active SOS forum {Survivors of Suicide}
http://neurotalk.psychcentral.com/forum29.html
for survivors, for family, members that had those feelings before or still do at times.