Sorry this has to be so quick, but no time today ...

I didn't see the McGill pain index mentioned yet, but for my daughter, that was very helpful. Try printing it out from a link somewhere where it says RSD/CRPS instead of causalgia (the old name) and showing it to him - it shows RSD as the worst pain, worse than amputation. It's also easier and quicker to look at a chart than to read an article.

The chart from American RSDHope is a good one - try googling American RSDHope and McGill pain index. I can't remember the link policy here, or I would give you the link.

So sorry to hear of your difficulties Prayers and gentle hugs!