
Complex Regional Pain Syndrome (CRPS)
History
Post-injury or surgery (even minor trauma)
Severe distal limb pain, disproportionate to event
Early signs of disuse, functional decline
Diagnosis (Budapest Criteria)
Requires symptoms in ≥3 of 4 categories & signs in ≥1 category:
Sensory: Spontaneous pain, burning, hyperalgesia, allodynia
Vasomotor: Temperature asymmetry, skin colour changes (red, blue, pale)
Sudomotor/Oedema: Oedema, asymmetrical sweating
Motor/Trophic: Weakness, tremors, ↓ movement, hair/skin/nail changes
Additional Findings: ↓ ROM, pain with light touch
Management
Early physiotherapy (graded exercise, functional restoration)
Psychological support (CBT) for pain-related distress
Neuropathic pain management: Pregabalin/Gabapentin
Pain clinic referral (consider sympathetic nerve blocks)
Patient education: Early mobilisation, trigger avoidance
Adjuncts (less evidence): Opioids, corticosteroids, carbamazepine
Regular follow-up (monitor & adjust treatment)
Refractory cases: Mirror therapy
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