Complex regional pain syndrome following an episode of Herpe
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Complex regional pain syndrome (CRPS) is a clinical syndrome characterized by a constellation of findings including searing pain disproportionate to any inciting event, hyperalgesia, edema, allodynia, as well as sudomotor, vasomotor and skin changes. CRPS is notoriously difficult to treat given the poorly understood mechanisms underlying the initiation of the syndrome, which is thought to be related to sustained sympathetic nervous system activation. CRPS Type I is the most common and involves a limb without a direct nerve injury. CRPS Type II, previously referred to as causalgia, involves a defined nervous pathway and is associated with a direct nerve injury. In contrast, shingles, which is caused by the reactivation of the herpes zoster virus that typically lies dormant in the dorsal root ganglia of previously exposed individuals, affects a discrete dermatomal area with a classic vesicular rash and pain. Post?herpetic neuralgia is a frequent occurrence after shingles and is known to cause pain for long periods after the dermatomal rash has cleared. It usually involves the thoracic or abdominal dermatomes. We present this pathology affecting a 71-year-old female in the right upper extremity.

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