Here is the Budapest Critieria for CRPS to which @livelifes referred.
https://www.ncbi.nlm.nih.gov/books/NBK464482/
"To make the clinical diagnosis, the following criteria must be met:

- Continuing pain, which is disproportionate to any inciting event.

- Must report at least one symptom in all four of the following categories:
--sensory – reports of hyperaesthesia and/or allodynia
--vasomotor – reports of temperature asymmetry and/or skin colour changes and/or skin colour asymmetry
--sudomotor/oedema – reports of oedema and/or sweating changes and/or sweating asymmetry
motor/trophic – reports of decreased range of motion and/or motor dysfunction (weakness, tremor, dystonia) and/or --trophic changes (hair, nail, skin).

- Must display at least one sign at time of evaluation in two or more of the following categories:
--sensory – evidence of hyperalgesia (to pinprick) and/or allodynia (to light touch and/or temperature sensation and/or deep somatic pressure and/or joint movement)
--vasomotor – evidence of temperature asymmetry (> 1 °C) and/or skin colour changes and/or asymmetry
--sudomotor/oedema – evidence of oedema and/or sweating changes and/or sweating asymmetry
--motor/trophic – evidence of decreased range of motion and/or motor dysfunction (weakness, tremor, dystonia) and/or trophic changes (hair, nail, skin)

-There is no other diagnosis that better explains the signs and symptoms."