Ulnar nerve decompression or transposition
Content reviewed by✓Mr Andrew Davies, PhD FRCS (Tr & Orth)· Reviewed June 2026Surgery for cubital tunnel syndrome aims to relieve pressure on the ulnar nerve at the elbow. This guide explains what to expect before your operation and during recovery.
Step 1 - Your pre-operative assessment
ℹ️ Your pre-assessment is usually 2–4 weeks before surgery. Cubital tunnel decompression is typically a day-case procedure with a straightforward recovery.
This is a relatively minor procedure compared to joint replacement surgery. Pre-operative assessment ensures you are fit for anaesthesia and that nerve conduction studies are available to the surgical team.
Blood tests
Routine checks to confirm fitness for anaesthesia.
Nerve conduction studies
Ensure a copy of your nerve conduction study (EMG) results is available for the surgical team before your operation.
Anaesthetic options
Cubital tunnel release is commonly performed under general anaesthesia or regional block (brachial plexus block) with sedation. Local anaesthesia alone may be used for straightforward cases.
Medication review
Anti-inflammatories should be stopped 5–7 days before surgery. Blood thinners will be reviewed.
Realistic expectations for nerve recovery
Nerve healing is slow. Numbness and tingling in the ring and little fingers may improve gradually over weeks to months. Muscle wasting, if present, takes longer to recover and may not fully resolve. Early surgery generally gives better results.
The day of surgery
ℹ️ You will be given a specific arrival time. Have no food from 2am on the day of surgery; you may drink clear water until 6am. Bring your medication list and any documents sent by the hospital.
Arrive at the time given
You will be admitted to the ward or day surgery unit, change into a gown, and be seen by the nursing, anaesthetic, and surgical teams before theatre.
Consent and marking
Your surgeon will confirm the procedure, mark the operative side, and you will sign a consent form before going to theatre.
Anaesthetic
You will meet the anaesthetist in the anaesthetic room. Once anaesthesia is established, the procedure will begin.
Recovery room
After surgery you will wake in the recovery room where nurses monitor your vital signs until you are stable and comfortable.
In hospital
Most patients having arthroscopic or day-case procedures go home on the day of surgery. Those having joint replacement typically stay 1–2 nights. Before discharge, the team will check your pain is controlled, give you wound care instructions, and confirm your follow-up appointment.
Pain control
You will be given oral pain relief before discharge. Take it regularly for the first 48 hours rather than waiting until pain is severe.
Wound check and dressing
A nurse will check the wound before you leave and explain how to keep it clean and dry.
Discharge letter and follow-up
You will receive a letter for your GP and details of your next outpatient appointment - usually at 2 weeks for a wound check.
You must not drive yourself home
Arrange for a family member or friend to collect you. You must not drive on the day of surgery if you have had a general anaesthetic or sedation.
Going home
⚠️ Important: Nerve recovery after cubital tunnel release is gradual and can take up to 12 months. It is normal to still have some numbness or tingling in the early weeks after surgery. This does not mean the operation has failed. Follow your physiotherapist's instructions and avoid prolonged elbow bending.
Keep the wound clean and dry
Avoid getting the wound wet until it is fully healed - usually 10–14 days. Use a waterproof cover or cling film when showering.
Take your pain relief as prescribed
Do not wait until pain is severe before taking medication. Regular simple analgesia (paracetamol, ibuprofen if appropriate) is more effective.
Attend your wound check appointment
This is usually 2 weeks after surgery. Sutures or clips will be removed if used.
When to contact the hospital
Seek urgent advice if you develop increasing redness, warmth, swelling, discharge from the wound, or a temperature above 38°C - these may indicate infection.
Recovery week by week
Pre-assessment
Blood tests, medication review, nerve conduction results confirmed with surgical team.
Day-case procedure
The operation takes 30–60 minutes. The ulnar nerve is decompressed (and transposed if required). You go home the same day.
Wound care
Keep the wound clean and dry. The elbow may be placed in a bandage or light splint for comfort for the first 1–2 weeks.
Gentle movement and nerve gliding
Physiotherapy exercises to restore elbow movement and encourage nerve recovery. Avoid prolonged elbow bending.
Nerve recovery
Sensation in the ring and little fingers gradually improves. Full recovery of nerve function can take up to 12 months, particularly if symptoms were longstanding.
Will I need a sling?
A sling is not usually required. A bandage or soft dressing is applied for the first 1–2 weeks. Gentle movement is encouraged from day one.
When will the numbness go?
Numbness and tingling often begin to improve within weeks of surgery, but full recovery can take up to 12 months. The longer symptoms have been present, the slower the recovery.
When can I return to work?
Office-based work is usually possible within 1–2 weeks. Manual work may require 4–6 weeks off, depending on job demands.
What is the difference between decompression and transposition?
Simple decompression releases the tight tissue around the nerve. Transposition moves the nerve to the front of the elbow to prevent it being stretched. Your surgeon will decide which is most appropriate based on your anatomy and the severity of compression.
Recovery calendar
A week-by-week guide to recovery. Individual timelines vary, always follow your surgical team.
Consent information
Purpose and intended benefits
The aim of cubital tunnel surgery is to relieve pressure on the ulnar nerve, preventing further nerve damage and allowing recovery of sensory and motor function. Sensory symptoms (numbness and tingling) typically improve first. Motor recovery depends on the severity and duration of nerve compression before surgery.
What the procedure involves
Simple decompression: through a small incision behind the medial epicondyle, Osborne ligament and any other compressive structures are divided. The nerve remains in its groove. Anterior transposition: the nerve is freed from its groove and relocated to in front of the medial epicondyle, either subcutaneously, between the muscles, or beneath the flexor-pronator mass (submuscular). Both procedures are performed under general or regional anaesthetic and take approximately 30-60 minutes.
Alternative treatments
Night splinting and activity modification
An elbow splint worn at night and avoidance of prolonged elbow flexion. Effective for mild cases (McGowan Grade 1). Does not address structural compression.
Simple decompression
Less extensive than anterior transposition. Appropriate when the nerve does not sublux and there is no prior surgery.
Anterior transposition
More extensive but appropriate for subluxing nerve, recurrent cubital tunnel syndrome, or following previous surgery on the medial elbow.
No treatment
In mild cases, observation is reasonable. In cases with progressive motor weakness or wasting, delay risks permanent nerve damage.
Risks of the procedure
If significant muscle wasting (denervation) is already present before surgery, motor function may not fully recover even after successful decompression. Surgery does not guarantee recovery.
A small sensory nerve crossing the surgical field may be inadvertently damaged, causing a patch of numbness or painful neuroma on the medial forearm.
Bleeding into the wound, which may require drainage.
Wound infection, usually treated with antibiotics.
Symptoms may recur after simple decompression if the nerve subluxes. Revision to anterior transposition may be required.
Rare complication of submuscular transposition.
Expected and managed with regular analgesia.
Some patients notice a temporary increase in tingling or numbness immediately after surgery as the nerve begins to recover. This is normal.
The medial elbow scar may be tender for several months.
Usually minor and resolves with mobilisation.
If you choose not to have surgery
In mild cases, symptoms often remain stable or improve with conservative measures such as activity modification and night splinting. In moderate to severe cases, ongoing nerve compression can lead to weakness and muscle wasting, and once this is established some of it may not fully recover - so where nerve function is already affected, earlier surgery tends to give the best chance of a good result. The right timing depends on how advanced the symptoms are, and your surgeon will discuss this with you.
Your questions, answered
Plain-English answers to the things people most often ask, drawn from real patient questions and grounded in published guidance. Tap a question to open it.
About thisWhat is cubital tunnel syndrome?
The ulnar nerve is squeezed where it passes the inner side of the elbow (the "funny bone"). This causes pins and needles or numbness in the little and ring fingers, and sometimes hand weakness. It is often worse when the elbow is bent for long periods, such as overnight or holding a phone.
Your choiceDo I need surgery?
Milder symptoms often improve with simple changes: avoiding leaning on the elbow, taking breaks from prolonged bending, and keeping the elbow straighter at night. Surgery to release or reposition the nerve is considered when symptoms persist or worsen, or if there is weakness or muscle wasting.
Self-careWhat helps day to day?
Avoid resting or leaning on the elbow, keep the elbow straighter where you can, and at night a soft splint or simply wrapping a towel loosely around the front of the elbow can stop it bending fully. Regular breaks from bent-elbow positions help too.
Getting backWill surgery cure it?
Surgery usually stops symptoms getting worse and often eases the tingling. Numbness and weakness that have been present for a long time may recover slowly or only partly, which is why it is worth seeking review if symptoms are progressing rather than waiting.
RecoveryHow long is recovery after surgery?
You can usually move the elbow fairly soon, with heavier use and full activity returning over several weeks. Nerve symptoms can keep improving gradually over months. Your team will guide any splinting and activity steps.
UrgentWhen should I seek help sooner?
New or worsening hand weakness, clumsiness with fine tasks, or wasting of the muscles between the fingers suggests the nerve needs prompt assessment.
WellbeingMy sleep is disturbed by tingling, is that common?
Yes, night-time symptoms are common because the elbow tends to bend during sleep. Night positioning or a splint often helps; mention persistent night symptoms to your team.
- Versus Arthritis: elbow pain
- British Elbow & Shoulder Society: exercises for elbow stiffness
- British Elbow & Shoulder Society: patient information
These links are to UK clinical guidance and patient information from recognised organisations. This page is for general information and does not replace personalised advice from your own clinical team.