Hydrodissection vs Cortisone for Nerve Pain – Why One Repairs and One Masks
If you have been dealing with nerve pain – whether carpal tunnel syndrome, sciatica, cubital tunnel, thoracic outlet or any other nerve entrapment condition – you have almost certainly been offered a cortisone injection at some point. It is the most commonly performed procedure for nerve pain in both NHS and private settings. But an increasing body of evidence and clinical experience suggests that for nerve entrapment specifically, cortisone is not the right tool – and that ultrasound guided Hydrodissection is producing significantly better and more lasting outcomes.
In this post we explain how each treatment works, what the evidence shows and why the mechanism of Hydrodissection makes it fundamentally better suited to nerve entrapment than cortisone.
How Cortisone Works for Nerve Pain
Cortisone – or corticosteroid – injections work by suppressing the inflammatory response around the affected nerve. The steroid blocks the production of inflammatory cytokines and prostaglandins, reducing the swelling and inflammation that is compressing or irritating the nerve and producing the pain, numbness and tingling.
For nerve pain the relief can be meaningful – particularly in the short term. The inflammation reduces, the pressure on the nerve eases and symptoms improve. But the relief is temporary. The steroid does not release the mechanical entrapment that is compressing the nerve. It does not address the fascial adhesion, the scar tissue or the anatomical restriction that has trapped the nerve in the first place. When the steroid wears off – typically after six to twelve weeks – the nerve is still trapped and the symptoms return.
The Problem with Repeated Cortisone for Nerve Entrapment
Beyond the temporary nature of the relief there is a more significant concern with repeated cortisone around nerves. Multiple published studies have demonstrated that corticosteroids are directly neurotoxic at high concentrations – they can damage the myelin sheath surrounding the nerve and impair nerve conduction. This is particularly well documented for intraneural injections but the risk exists with perineural injections as well.
Additionally cortisone weakens the surrounding connective tissue with repeated use – the very tissue that needs to be healthy to prevent further nerve entrapment. Repeated cortisone into the carpal tunnel for example has been associated with weakening of the flexor retinaculum and surrounding structures.
Most guidelines now recommend a maximum of three to four cortisone injections into any single site for precisely this reason – yet patients frequently find themselves on a cycle of repeat injections that work for shorter and shorter periods as the underlying entrapment worsens.
How Hydrodissection Works for Nerve Entrapment
Ultrasound guided Hydrodissection is a completely different approach to nerve pain. Rather than suppressing the inflammation around a trapped nerve it mechanically releases the entrapment itself.
Using our SonoSite ultrasound machine we visualise the affected nerve in real time – seeing it as it travels through the surrounding tissue and identifying the precise point where it is being compressed, restricted or entrapped. A fine needle is guided under live imaging to the exact location of the entrapment and a natural solution – typically 5% dextrose combined with B12 – is injected around the nerve.
The fluid pressure of the injection gently separates the fascial layers, scar tissue and adhesions that are compressing the nerve – a purely mechanical release. The 5% dextrose simultaneously delivers a direct anti-inflammatory effect at the nerve interface, reducing the neurogenic inflammation that has developed around the compressed nerve. The B12 component supports nerve remyelination and tissue repair alongside the mechanical release.
Crucially – we can watch the release happen on the ultrasound screen in real time. The fluid spreads around the nerve, the surrounding tissue separates and the nerve is freed from its entrapment before we finish the procedure.
The Evidence
The evidence for Hydrodissection for nerve entrapment has been growing significantly over the past decade. A systematic review published in Frontiers in Pharmacology demonstrated significantly superior outcomes for ultrasound guided hydrodissection compared to landmark guided and non-guided injection approaches – with better accuracy of needle placement, lower complication rates and more consistent clinical results.
Mansiz-Kaplan et al 2022 demonstrated significantly better outcomes for ultrasound guided 5% dextrose injection compared to corticosteroid injection for ulnar neuropathy at the elbow – specifically comparing Hydrodissection against cortisone and finding dextrose superior at six months and beyond.
For carpal tunnel syndrome multiple RCTs have demonstrated that dextrose Hydrodissection produces more durable outcomes than cortisone injection with a better long term safety profile.
Hydrodissection vs Cortisone – A Direct Comparison
- Mechanism: Cortisone – suppresses inflammation. Hydrodissection – mechanically releases the entrapment.
- Duration of relief: Cortisone – typically 6 to 12 weeks, diminishing with repetition. Hydrodissection – progressive improvement lasting months to years.
- Effect on nerve: Cortisone – potential neurotoxicity with repeated use. Hydrodissection – directly therapeutic, supports remyelination.
- Effect on surrounding tissue: Cortisone – weakens connective tissue with repeated use. Hydrodissection – no negative tissue effects.
- Precision: Cortisone – often landmark guided, approximate placement. Hydrodissection – live ultrasound guidance, exact placement confirmed on screen.
- Addresses the cause: Cortisone – no. Hydrodissection – yes, directly releases the mechanical entrapment.
When We Combine Hydrodissection with Neuro Prolotherapy
At Proback we regularly combine Hydrodissection with Neuro Prolotherapy for nerve pain presentations. Hydrodissection releases the mechanical entrapment. Neuro Prolotherapy – precise subcutaneous micro injections of 5% dextrose along the superficial nerve pathway – addresses the chronic neurogenic sensitisation that has developed around the entrapped nerve and that continues to generate pain even after the mechanical release.
For patients with long standing nerve pain this combination addresses every component simultaneously – mechanical entrapment, neurogenic inflammation and nerve pathway sensitisation – producing the most comprehensive and lasting results.
Pricing and Next Steps
Our initial consultation is currently on special offer at £110 – reduced from £270 – and includes a full clinical examination, ultrasound assessment where appropriate and a dedicated results appointment where your findings and a personalised treatment plan are explained in full before you commit to anything further.
Treatment: first area £275 per session, each additional area £85. 15% discount when prepaying for a full course upfront.
Give us a call on 0207 976 6648 or email victoria@proback.co.uk.
Proback Clinic, 4 Evelyn Mansions, Carlisle Place, Victoria, London SW1P 1NH. Five minutes from Victoria station.
