Written by Yuna Zhuang, Principal Hand Occupational Therapist at Phoenix Rehab, AHPC A1700999G.Clinically reviewed by Nigel Chua, Principal Hand Occupational Therapist & Director, AHPC A1300362Z.Last reviewed 7 October 2026.
Wartenberg’s syndrome is a pinched superficial radial nerve, the skin nerve on the thumb side of the forearm, causing burning, tingling or numbness over the back of the thumb and hand. The nerve supplies skin only, so it weakens no muscle. A tight watch strap, repeated wrist twisting, or a cast or operation near the wrist usually sets it off.
Key takeaways
- Wartenberg’s syndrome is a pinched superficial radial nerve. It causes burning, tingling or numbness over the back of the thumb and the back of the hand on the thumb side.
- The nerve supplies skin only. Weakness lifting the thumb or the wrist points to a different nerve and needs a doctor.
- A tight watch or smartwatch strap, a tight cuff, repeated twisting with the wrist tilted, and a cast or operation near the wrist are the usual triggers.
- De Quervain’s tenosynovitis is a tendon problem, felt as pain at the thumb side of the wrist. The two can occur in the same wrist.
- Taking the pressure off the nerve comes first. Nerve conduction studies, injections and surgery are a doctor’s decision.
What is Wartenberg’s syndrome?
The radial nerve splits near the elbow. One branch drives the muscles that lift the wrist and fingers. The other, the superficial radial nerve, carries feeling and nothing else. It runs down the forearm under the brachioradialis, the muscle on the thumb side, comes out from under its tendon in the lower third of the forearm, and travels just under the skin to the back of the thumb and hand.
Where it surfaces, it lies between two tendons. Turn your palm down and those tendons close on it like a pair of scissors. Dellon and Mackinnon described this pinch in the forearm in 1986.1 Doctors also call the condition cheiralgia paresthetica, or superficial radial nerve entrapment.
The nerve sits close enough to the surface that a watch strap, a cuff, a cast edge or a scar can press on it.
What does Wartenberg’s syndrome feel like?
Burning, pins and needles or a numb patch over the back of the thumb and the back of the hand between the thumb and index finger, sometimes over the thumb side of the wrist. Some people feel a zap toward the thumb when they knock or press the thumb side of the forearm, a few finger-widths above the wrist. Turning a key, wringing a cloth or pulling on a tight sleeve sets it off.
Grip and pinch test normal, though pain can make you hold back. A thumb or wrist that will not lift is a different nerve, and that goes to a doctor first.
Common causes, in the order to check them
1. Something tight around the wrist
A watch, smartwatch or fitness band worn snug, and worse if you sleep in it for the sleep tracking. A bracelet, a hair tie kept on the wrist, a tight shirt cuff, a staff-pass lanyard wound round the wrist on the MRT, a handbag hooked over the forearm. Look at the skin. A dent from the strap sitting over the burning spot answers most of the question.
2. Twisting with the wrist tilted
Palm down with the wrist tilted toward the little finger is the position that closes the tendons on the nerve. Wringing a cloth or a mop. Driving a screwdriver. Turning a stiff gate key. Pressing a pipette plunger through a long run at the lab bench. Tossing a wok through a lunch service.
3. A fracture, cast or operation near the wrist
The nerve runs close to the end of the radius. A wrist fracture, swelling under a cast, a cast or splint edge, a plate or pins, a De Quervain’s release, a thumb-base operation, or a drip line put into a vein at the wrist can all irritate it. After surgery near the wrist, a numb or burning patch near the scar is common and often settles. One that spreads goes to your surgeon.
4. De Quervain’s tenosynovitis next door
The nerve crosses over the tendon tunnel that De Quervain’s tenosynovitis affects. Swelling there, or a tight thumb splint, can irritate it. Lanzetta and Foucher published a series of patients who had both conditions in the same wrist.2
Wartenberg’s syndrome, De Quervain’s, carpal tunnel or your neck?
Put a finger on the spot, then think about what it feels like. Those two answers separate them.
| Condition | Where you feel it | What it feels like | What sets it off |
|---|---|---|---|
| Wartenberg’s syndrome | Back of the thumb, back of the hand between thumb and index finger, sometimes the thumb side of the wrist | Burning, tingling or numbness, a zap when the forearm is pressed. Strength normal | A tight strap or cuff, turning the palm down with the wrist tilted toward the little finger, pressure on the forearm above the wrist |
| De Quervain’s tenosynovitis | Thumb side of the wrist, over the tendons, sometimes with swelling | Sharp or aching pain, without numbness | Lifting with the thumb out: a baby, a kettle, a pot. Tucking the thumb into the fist and tilting the wrist down |
| Carpal tunnel syndrome | Palm side of the thumb, index, middle and half the ring finger. The back of the hand feels normal | Tingling and numbness, often waking you at night, eased by shaking the hand | Gripping, a bent wrist, holding a phone or a steering wheel, sleeping with the wrists curled |
| Pinched nerve in the neck (cervical radiculopathy) | Down the arm into the thumb and index finger, front and back, often with neck or shoulder-blade pain | Tingling, numbness or aching down the arm, sometimes weakness | Turning or tilting the neck, looking up, long hours at a screen |
| Radial nerve palsy | A numb patch on the back of the hand, and a wrist and fingers that will not lift | Weakness more than pain | A fracture of the upper arm bone, or sleeping with the arm over a chair back |
Wartenberg’s and De Quervain’s can share a wrist, and the standard test for De Quervain’s makes it harder to tell. Tucking the thumb into the fist and tilting the wrist down loads the tendons and stretches the superficial radial nerve at the same time, so a painful test can come from either. We test the nerve and the tendons one at a time for that reason.
What we measure
- Tinel’s sign along the nerve. We tap gently up the thumb side of the forearm and mark the point where the tingling shoots toward the thumb. That point shows where the nerve is being pinched.
- The provocation test. You turn the forearm fully palm down with the wrist tilted toward the little finger, and we time how long the tingling takes to start.
- Sensation. Light touch and two-point testing over the back of the thumb and hand, against the other side. We draw the numb patch on the skin and photograph it, so at the next visit we compare the outline, not anyone’s memory of it.
- Your neck. Neck movement and the nerve tests for the arm, to rule out a nerve root in the neck.
- Strength. Grip and pinch in kilograms against the other hand, and lifting the thumb and wrist, which should be normal. If they are not, we refer you to a doctor.
Tested, not dated. The plan moves on when the measures say so.
Wartenberg’s syndrome treatment: what we do
- Take the pressure off. The strap, the cuff, the splint edge, the bag on the forearm. We go through what touches that spot across your day.
- Change the load and the position. Break up the twisting tasks, swap hands, change the tool or the handle, and keep the wrist out of the palm-down, tilted position for long runs.
- Nerve gliding. Gentle movements that slide the nerve through the forearm without stretching it hard. See nerve gliding exercises.
- A splint, where it helps. A custom thermoplastic splint shaped so its edge stays off the nerve, for the tasks or the nights that set it off.
- Desensitization. When the skin over the thumb has become oversensitive, graded textures and touch retrain it. After surgery, scar work as well.
- Referral. Nerve conduction studies, an ultrasound scan, medication, an injection and surgery are a doctor’s decisions. If the picture does not fit, or it is not settling, we write to your GP or hand surgeon with what we found. Surgery to free the nerve is described in published case series, usually after non-surgical care has been tried.3
In the Phoenix Recovery Protocol this starts at Calm & Protect: stop the pinch and settle the nerve. Move & Mobilize brings back forearm turning and wrist tilting without symptoms. Rebuild & Strengthen loads the grip for the tasks that set it off, and Return & Perform tests them: the full run at the pipette, the wok, the watch back on.
What you can do this week
- Move the watch to the other wrist, or leave it off for two weeks. If you sleep in a smartwatch, take it off at night.
- Loosen tight cuffs and sleeves. Carry bags in the hand or on the shoulder, not hooked over the forearm.
- Wring cloths by pressing them against the sink instead of twisting. Use a power screwdriver. At the lab bench, split pipetting into blocks and alternate hands where your protocol allows.
- Leave the sore spot alone. Pressing it to check, tapping it and hard massage keep it irritated.
- Keep using the hand for ordinary tasks. Slow, easy forearm turning and wrist tilting is fine if any tingling has gone within a minute afterward.
- Pain relief and anti-inflammatory medication are a decision for your doctor or pharmacist.
Is this normal?
Usually expected: a burning or numb patch that comes and goes with the strap or the task, and eases over days to weeks once the pressure is off. After a wrist fracture or an operation near the wrist, a numb patch near the scar that shrinks week by week.
Worth getting checked: a patch that is the same size or bigger after a few weeks without the strap, tingling that now comes on at rest, or a zap that wakes you.
When to see a doctor first
- Call 995 if numbness or weakness comes on suddenly down one side of the body, with a drooping face or slurred speech.
- Go to the emergency department now if a cut to the forearm or wrist will not stop bleeding, or the hand turns cold, pale or blue.
- See a doctor the same day if the numbness started after a deep cut to the forearm, wrist or back of the hand, because a cut nerve needs a surgeon to look at it. The same applies if the forearm is hot, red and swollen, or you have a fever.
- See a doctor soon if you cannot lift the thumb or the wrist, or they are weaker than on the other side. That is a different nerve, and radial nerve palsy explains it. Also see a doctor soon for a lump along the forearm, symptoms spreading with neck pain, tingling or weakness in both hands, or numbness after surgery that is spreading.
Where are you with this right now?
1. It is settling on its own
The strap came off and the burning has faded week by week. The patch is smaller, and turning a key no longer sets it off. That is a nerve settling once the pinch stops, and it is behaving normally. You do not need us for this, and we would rather say so.
2. It has stopped improving
The watch has lived on the other wrist for six weeks. The back of your thumb still burns when you wring out the dishcloth, turn the gate key, or reach the two-hundredth press of the pipette. You type with that thumb held off the space bar.
The bench work takes longer, the laundry has gone to someone else, and the watch you paid for sits in a drawer.
Taking the pressure off was the right first move, and for many people it is enough. When it has not been enough, the pinch is usually somewhere you cannot see: where the nerve leaves the tendon in the forearm, at a scar, or at the tendon tunnel next door. More weeks without the watch do not test any of those.
The burning comes and goes. Has anyone found the point along your forearm where the nerve is being pinched, or drawn the numb patch so you can tell whether it is shrinking?
The Stalled Recovery Review is three weeks with the same therapist. The first visit finds where the nerve is being pinched. The next two measure how it responds when the pressure and the load change.
3. You have had surgery, or you have a date
After a wrist fracture plate, a De Quervain’s release or a thumb-base operation, the superficial radial nerve runs close to the scar, and a burning patch there is part of what we work on alongside the stiffness. See the Wrist Fracture Recovery Program, thumb-base arthritis and its surgery, or hand therapy after surgery. Your surgeon’s protocol takes precedence.
All of it runs on the same four stages. The Phoenix Recovery Protocol explains what each stage works on and what you have to meet to move up. No referral needed to start.
Next step
Find out which stage you are in
Pain is the first thing to leave. Movement and strength are the last things trained back, and most people stop before that part is done. One Assessment and Treatment is a single 45-minute appointment at $230, nett, no GST. Your therapist finds what is actually limiting you, treats it in the same appointment, and you leave with your current stage and a written plan.
What our patients say
Google reviews from our clinics in Singapore.
Prefer to phone? Each of our five clinics has its own number on the clinics page. No referral needed to book.
Related reading
Sources: 1. Dellon AL, Mackinnon SE. Radial sensory nerve entrapment in the forearm. J Hand Surg Am. 1986;11(2):199-205. 2. Lanzetta M, Foucher G. Association of Wartenberg’s syndrome and De Quervain’s disease: a series of 26 cases. Plast Reconstr Surg. 1995;96(2):408-412. 3. Lanzetta M, Foucher G. Entrapment of the superficial branch of the radial nerve (Wartenberg’s syndrome). Int Orthop. 1993;17(6):342-345.
Where we are
Clinics across Singapore
ORCHARD
400 Orchard Road #12-12
Orchard Towers, S238875
NS22 Orchard MRT
Physiotherapy and hand therapy in Orchard →
WhatsApp 8800 1830TAMPINES
9 Tampines Grande #01-20
Asia Green, S528735
EW2DT32 Tampines MRT
Physiotherapy and hand therapy in Tampines →
WhatsApp 8780 9608SERANGOON
265 Serangoon Central Drive #04-269
S550265 · Lift C only
NE12CC13 Serangoon MRT
Physiotherapy and hand therapy in Serangoon →
WhatsApp 8892 4121TANJONG PAGAR
10 Anson Road #02-77A
International Plaza, S079903
EW15 Tanjong Pagar MRT
Physiotherapy and hand therapy in Tanjong Pagar →
WhatsApp 8227 7074JURONG EAST
2 Venture Drive #02-02
Vision Exchange, S608526
NS1EW24 Jurong East MRT
Opening 20 October 2026
Physiotherapy and hand therapy in Jurong East →
WhatsApp 8242 7340Questions people ask
What is Wartenberg’s syndrome?
Wartenberg’s syndrome is a pinched superficial radial nerve, the skin nerve on the thumb side of the forearm. It causes burning, tingling or numbness over the back of the thumb and the back of the hand between the thumb and index finger. Doctors also call it cheiralgia paresthetica, or superficial radial nerve entrapment.
How is Wartenberg’s syndrome different from De Quervain’s tenosynovitis?
Wartenberg’s syndrome is a nerve problem, felt as burning, tingling or numbness over the back of the thumb. De Quervain’s tenosynovitis is a tendon problem, felt as aching pain at the thumb side of the wrist, without numbness. The two can occur in the same wrist, so a hand therapist tests the nerve and the tendons one at a time.
Can a watch strap cause Wartenberg’s syndrome?
Yes. The superficial radial nerve runs just under the skin on the thumb side of the forearm, close enough to the surface that a snug watch, smartwatch or fitness band can press on it. Tight cuffs, bracelets, hair ties and bags hooked over the forearm can do the same. Taking the pressure off the nerve comes first.
Does Wartenberg’s syndrome cause weakness in the hand?
No. The superficial radial nerve supplies skin only, so it weakens no muscle. Grip and pinch usually test normal, though pain can make you hold back. If you cannot lift the thumb or the wrist, or they are weaker than on the other side, that points to a different nerve, and you should see a doctor.
How is Wartenberg’s syndrome treated?
Treatment starts with taking the pressure off the nerve: the strap, the cuff, the splint edge. A hand therapist changes the load and position of twisting tasks, adds gentle nerve gliding, a custom splint where it helps, and desensitization. Nerve conduction studies, medication, injections and surgery are a doctor’s decision.