Complex regional pain syndrome

What is complex regional pain syndrome?

Complex regional pain syndrome, usually shortened to CRPS, is a chronic pain condition that develops after an injury and produces pain disproportionate to what caused it.

The hallmark is that the pain does not follow the expected course. Rather than diminishing as the injury heals, it persists and frequently spreads beyond the original site.

It is often accompanied by visible changes, including swelling, altered skin colour and temperature, changes in hair and nail growth, and eventually stiffness and muscle wasting.

It was formerly known by other names including reflex sympathetic dystrophy, which still appears in older records.

It is among the most challenging conditions to present in litigation and among the most genuinely disabling.

What features are recognized?

Diagnosis rests on a combination of reported symptoms and observed signs.

• Continuing pain disproportionate to the initiating event
• Extreme sensitivity, where light touch produces severe pain
• Temperature and colour asymmetry between the affected and unaffected side
• Swelling and altered sweating patterns
• Changes in hair, nail and skin texture
• Reduced range of motion, weakness and tremor

Why are these claims difficult?

Because no single test confirms it. Diagnosis is made using established clinical criteria applied to the pattern of symptoms and signs, rather than by imaging or laboratory result.

The severity of reported pain, combined with the absence of a confirmatory test, makes the condition an obvious target for arguments about exaggeration.

It is nonetheless a genuine and well recognized condition, and the observable signs distinguish it from pain that is reported without objective correlate.

How is a CRPS claim built?

Through documentation of the observable findings by treating physicians over time. Recorded temperature difference, colour change and swelling are what carry these cases.

Photographs taken across the course of the condition are valuable, since visible asymmetry is persuasive in a way a narrative description is not.

Consistency across every provider matters more here than in almost any other injury, so a gap in treatment is particularly damaging.

Testimony from people who knew the person before is particularly valuable, since the behavioural changes are dramatic and observable.

Common questions

Can CRPS follow a minor injury?

Yes, and it frequently does. Disproportion between the initiating injury and the resulting pain is a defining feature rather than an inconsistency.

Is there a test that confirms it?

No single test confirms it. Diagnosis uses established clinical criteria, and imaging is generally used to exclude other causes.

Does CRPS resolve?

Some cases improve, particularly with early treatment, while others become chronic. Prognosis should come from a specialist familiar with the condition.