I found that prior to having RSD I could tolerate ice, after though, it felt like torture. This might be because the dysfunction of my sympathetic system included temperature disturbance very early.

While you might not be experiencing pain or problems from ice yet, you should not use ice unless it is confirmed that you do not have RSD. The other big concern is if you are in anyway immobilizing any part of your body--no braces, or even guarding. Move the limb or body parts that become effected as often and gently as possible--this is why aqua therapy for RSD is often prescribed, since it's easier to move with less impact.

Not everyone is a fan of sympathetic blocks, but this is what is claimed as the best chance for remission, if done early and correctly. Personally, I had stellate ganglion blocks done by two different docs, and they were vastly different experiences. The meds given and the technique used can make a BIG difference.

If burning pain is your only symptom, I'd get a 2nd opinion by an experienced RSD doc asap.

You might also not be noticing some symptoms. I started shaving my arms without realizing it was due to the weird hair growth. It's more obvious when my arms are wet, but the pattern follows exactly where my worst pain is on the one arm, with the hair longer and courser on both. Those that have drastic color changes and swelling are easier to diagnose. Pain can actually be MORE of a factor in those that don't have those sympathetic issues.

Dr. Hooshmand has been retired for many years, but I'm still a fan of his website. There's a ton of info in the puzzles, and It's worth checking out IMO.

Good luck.