For a new limb injury I will do my own Sphnoid block that my anesthologist taught me to do on myself, so i can do it morning and evening till it shuts down again.

Also there is an important use of Klonopin. ( name brand is best, as generic does not work). It will also shut down the pain. The pain is from the seizing from the sympathetic nervous system in overdrive as well as the acetocholine not flowing properly down the mylan sheath.

I also do some homeopathics. A bite is a puncture, so Ledum is for that.
arsinicicom works for the pain of RSD.

The block, if you google it it is down for stopping migraines, but it is extremely helful with RSD. My anesthologist in NM taught it to me using a long 1 sided cutie with 4% liquid lidocaine. A life safer for sure!!