Written and reviewed by the BPR clinical team. Last reviewed: 30 July 2026. This article is for education and is not a substitute for individual assessment, diagnosis or treatment by a qualified healthcare professional.
It often begins at night. You wake with a hand that's numb, tingling or aching, shake it out, and the feeling gradually returns. Over time it starts creeping into the day — while holding a phone, driving, or gripping the steering wheel. This is carpal tunnel syndrome, the most common trapped-nerve problem in the arm, and for many people it responds well to simple, non-surgical measures when caught in good time.
What is it?
The carpal tunnel is a narrow passage at the front of your wrist, formed by the wrist bones and a tough band of tissue across the top. Running through it are the tendons that bend your fingers and, crucially, the median nerve — which supplies feeling to your thumb, index, middle and half of your ring finger. Carpal tunnel syndrome occurs when pressure builds within that tunnel and squeezes the nerve, disturbing its signals. That's why the symptoms follow such a specific map across the hand.
Why does it happen?
Often there's no single cause. Anything that raises the pressure in the tunnel can contribute — sustained or repetitive gripping, awkward wrist positions, and fluid changes. It's also linked with pregnancy, an underactive thyroid, diabetes and rheumatoid arthritis, so sometimes it's a sign to look at the bigger health picture too.
What does it feel like?
The classic pattern is tingling, numbness or burning in the thumb, index, middle and half of the ring finger, typically worst at night and often relieved by shaking the hand — sometimes called the “flick sign.” As it progresses, people notice weakness or clumsiness, dropping things or struggling with fine tasks. In longer-standing cases the muscle at the base of the thumb can waste, which is a sign to act sooner rather than later.
How it's assessed
We'll ask about the pattern of your symptoms — which fingers, and when — because that map is very telling. On examination we use gentle provocation tests at the wrist to reproduce the tingling, check the sensation and strength in the hand, and look for any wasting of the thumb muscles. We'll also screen the neck, since a trapped nerve there can mimic or add to carpal tunnel symptoms. In some cases a nerve conduction test confirms the diagnosis and gauges its severity.
What the evidence says
- Night splints help. A Cochrane review found that splinting — particularly worn at night to keep the wrist neutral — relieves symptoms in mild-to-moderate carpal tunnel syndrome (Karjalainen et al., 2023).
- Start conservative for mild-to-moderate cases. Guidance recommends splinting, activity modification and, where helpful, exercise before considering surgery (NICE, 2024).
- Refer when it's severe. Constant numbness, significant weakness or wasting of the thumb muscles is a signal for a surgical opinion, and acting before the nerve is badly affected gives the best results.
How it's treated
For mild-to-moderate symptoms, non-surgical treatment is the sensible first step. The best-supported measure is a splint that holds the wrist neutral, worn at night, which keeps pressure off the nerve while you sleep (Karjalainen et al., 2023). Alongside that, adjusting how you use the hand during the day makes a real difference, and gentle nerve-gliding exercises, hands-on treatment of the forearm and workstation advice can help function and comfort.
When symptoms are severe, keep worsening, or there's already wasting or persistent weakness in the thumb, a surgical opinion is appropriate — a carpal tunnel release is a well-established procedure that relieves the pressure.
What you can do yourself
Try a neutral-wrist night splint — it's inexpensive, low-risk and often the single most helpful thing early on. Adjust the activities that provoke your symptoms, take regular breaks from sustained gripping, and set up your workstation to keep your wrist in a comfortable, neutral position. Gentle nerve-gliding exercises can help once you've been shown how.
When to seek help
When to seek help. See a clinician if the tingling is regular, disturbing your sleep, or affecting your grip. Seek review sooner if you notice constant numbness, weakness, or any wasting of the muscle at the base of the thumb, as these suggest the nerve needs more urgent attention.
Frequently asked questions
Will it go away on its own?
Mild cases can settle, especially if a temporary cause (like pregnancy) resolves or you change provoking habits. Persistent or worsening symptoms usually need treatment.
Do splints actually work?
Yes — a neutral-wrist night splint is well supported by the evidence for mild-to-moderate symptoms and is a sensible first step (Karjalainen et al., 2023).
Do I need surgery?
Not usually for mild-to-moderate cases. Surgery is considered when symptoms are severe or persistent, or there's thumb-muscle wasting.
Is it caused by typing?
Typing and repetitive wrist use can contribute, but it's rarely the only factor. Health conditions and wrist anatomy also play a role.
What exercises help?
Gentle median nerve glides and forearm stretches can help, ideally shown to you by a clinician so you don't overdo them.
How BPR can help
At BPR we'll confirm it's carpal tunnel syndrome rather than a look-alike, set you up with the right splinting and self-management, and advise clearly on when a surgical opinion is worth seeking. You can book an assessment at bpr.rehab.
References
- Karjalainen, T.V., Lusa, V., Page, M.J., O'Connor, D., Massy-Westropp, N. and Peters, S.E. (2023) 'Splinting for carpal tunnel syndrome', Cochrane Database of Systematic Reviews, 2, CD010003. doi:10.1002/14651858.CD010003.pub2.
- National Institute for Health and Care Excellence (NICE) (2024) Carpal tunnel syndrome. Clinical Knowledge Summary. Available at: https://cks.nice.org.uk/topics/carpal-tunnel-syndrome/ (Accessed: 30 July 2026).