Why CRPS Is So Often Misdiagnosed. And What a Proper Workup Should Look Like

Summary

Complex Regional Pain Syndrome often gets misdiagnosed because standard imaging shows normal results while symptoms present diffusely across different bodily systems. The condition develops when an injury or nerve irritation sensitizes the autonomic nervous system, causing normal sensations to register as burning, electric pain or swelling. When clinicians examine individual symptoms in isolation, they miss the broader sympathetic pattern. A thorough workup applies the Budapest Criteria, evaluates initial triggers, and uses diagnostic sympathetic nerve blocks to clarify if the sympathetic nervous system maintains the pain.

Conditions and treatments discussed

• Complex Regional Pain Syndrome (CRPS). CRPS develops after an injury or nerve irritation, causing an overactive autonomic response where normal sensations trigger burning pain, swelling, and temperature changes.
• Clinical exam and Budapest Criteria. A clinical examination evaluates physical markers like allodynia, swelling, color asymmetry, and sweating changes to establish a CRPS diagnosis.
• Sympathetic nerve blocks. Stellate ganglion blocks or lumbar sympathetic blocks help clarify whether the sympathetic nervous system maintains the patient's ongoing pain.
• IV lidocaine or ketamine trials. Intravenous lidocaine or ketamine trials help identify severe nervous system sensitization in selected cases.

What this shows about Manhattan Pain Medicine

In this article, Dr. Siefferman describes evaluating Complex Regional Pain Syndrome as a layered condition rather than a single label. Manhattan Pain Medicine reports an approach that combines clinical examination via the Budapest Criteria with targeted diagnostic sympathetic nerve blocks to clarify what keeps the nervous system activated. The practice emphasizes searching for both the driving trigger and the amplified autonomic response rather than relying on standard imaging alone. This illustrates the practice-reported model of diagnostic reconsideration, using iterative nerve interventions to gather data on complex chronic pain.