Welcome to NT!
I'm sorry to read about your situation: no parent should have to watch a child suffer.
The link to our RSD forum is
http://neurotalk.psychcentral.com/forum21.html
I do not know enough about RSD to offer any advice. Fortunately, there are many people here who will be able to help you.
In addition, to information about your son's specific condition, NT has much to offer Oliver and you.
While we have a variety of afflictions, everyone here understands the emotional toll any serious illness can take. We offer support to both patients and caregivers.
To combat the isolation of illness, we have subgroups for everything from gardeners to aspiring authors.
Feel free to roam the board. If you need help, just ask.
Cheers
p.s. Your English is better than mine and it's supposed to be my native tongue!