RSD is the same as CRPS type 1. CRPS type 2 is Causalgia. Symptoms, diagnosis, and treatment are the same...but in type 2 there is actual damage to a nerve that is not present in type 1. It can be confusing...but both types of CRPS are the same condition. RSD is the "old" name for the condition but is the one that most of the doctors in my area (IL) seem to use. I have type 1/RSD.