I wouldn't easily recommend blocks. They might work for some, but not all. If they don't have the desired effect, they might make the RSD worse, so you need to put careful thought into what kind of treatment you are willing to undergo. There are so many different forms of treatment out there in the form of medication (calcitonin, bisphosphonates, anti convulsants, pain medication, muscle relaxants, etc. ...) and then there's nerve blocks and spinal cord stimulators.

Consider all the options, talk about it carefully with your doctor(s) and then decide what you want to do and what they think is best for you in your case.