I really don't know. Medical habits...treatments, get very cultural. In US there is a liability term used called "standard of care". So most doctors have journals which explain this, and they all sort of band together and adhere to it to keep their insurance premiums down.

Daniella ( she also has RSD) here was offered a lidocaine infusion. And I have read on another board--at another site-- in the past, some chronic pain patients have tried it.

Some RSD doctors offer it here in US.

Lidocaine does affect the heart, and so there may be a liability constraint here.

Here is an article illustrating it:
http://www.ionchannels.org/showabstr...?pmid=10863041

and this:
http://www.medscape.com/viewarticle/409782_4
(you have to join --it is free-- to view medscape)

I really think it is a benefit vs risk decision. (both for the doctor and patient)