Table 1 Budapest criteria

Continuing pain, which is disproportionate to any inciting event

Must report at least one symptom in three of the four categories

Must display at least one sign at time of evaluation in two or more of the four categories:

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

1.Sensory: Reports of hyperesthesia and/or allodynia.

1.Sensory: hyperalgesia (to pinprick) and/or allodynia.

2.Vasomotor: Reports of temperature asymmetry, skin color changes, skin color asymmetry.

2.Vasomotor: temperature asymmetry (> 1 °C), skin color changes.

3.Sudomotor/Edema: Reports of edema, sweating changes, sweating asymmetry.

3.Sudomotor/Edema: edema, sweating changes, sweating asymmetry.

4.Motor/Trophic: Reports of decreased range of motion, motor dysfunction, trophic changes (hair, nail, skin)

4.Motor/Trophic: decreased range of motion and/or motor dysfunction, trophic changes.