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Table 2 IASP diagnostic criteria for CRPS [2]

From: Pediatric complex regional pain syndrome: a review

CRPS I CRPS II
1) The presence of an initiating noxious event, or a cause of immobilization.
2) Continuing pain, allodynia, or hyperalgesia with which the pain is disproportionate to any inciting event.
3) Evidence at some time of edema, changes in skin blood flow, or abnormal sudomotor activity in the region of the pain.
4) This diagnosis is excluded by the existence of conditions that would otherwise account for the degree of pain and dysfunction.
1) The presence of continuing pain, allodynia, or hyperalgesia after a nerve injury, not necessarily limited to the distribution of the injured nerve.
2) Evidence at some time of edema, changes in skin blood flow, or abnormal sudomotor activity in the region of the pain.
3) This diagnosis is excluded by the existence of conditions that would otherwise account for the degree of pain and dysfunction.
Note: Criteria 2–4 must be satisfied. Note: All three criteria must be satisfied.