Table 1. International Association for the Study of Pain Diagnostic Criteria for Chronic Regional Pain Syndrome Type 1.

Criteria 2–4 must be satisfied.

Diagnostic Criteria for Chronic Regional Pain Syndrome Type 1
1	Presence of an initiating noxious event or a cause of immobilization
2	Continuing pain, allodynia, or hyperalgesia with which 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	Diagnosis is excluded by the existence of conditions that would otherwise account for the degree of pain and dysfunction