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 small wrist bones on three sides and a tough, unyielding band of connective tissue (the transverse carpal ligament) across the top. Running through this confined space are the nine tendons that bend your fingers and, crucially, the median nerve — which supplies feeling to your thumb, index finger, middle finger and half of your ring finger, and also controls some of the small muscles at the base of the thumb. Carpal tunnel syndrome occurs when pressure builds within that already tight tunnel and squeezes the nerve, disturbing its normal electrical signals.
That's why the symptoms follow such a specific and recognisable map across the hand — sparing the little finger, which is supplied by a different nerve entirely — and why treatment aims specifically to take the pressure off the median nerve and help it move and glide freely within the tunnel once again.
Why does it happen?
Often there's no single, identifiable cause, which can be frustrating for people looking for a clear explanation. Anything that raises the pressure within the tunnel can contribute — sustained or repetitive gripping activities, awkward or prolonged wrist positions such as extended computer use, and fluid retention or swelling within the tunnel. Work and hobbies that involve prolonged wrist bending or forceful, repetitive hand use can play a role too, which is one reason why adjusting how you use the hand and wrist during the day is often part of an effective solution rather than something separate from it.
It's also linked with pregnancy, particularly in the later stages due to fluid retention, an underactive thyroid, diabetes, and rheumatoid arthritis, so occasionally a new diagnosis of carpal tunnel syndrome is a useful prompt to look at the bigger picture of someone's general health rather than treating it purely as a local, mechanical wrist problem. It also becomes more common with age, and is somewhat more frequent in women than men. It also quite commonly affects both hands, though often not to an equal degree, and one side may become noticeably more symptomatic than the other for some time before the second hand catches up. This asymmetry is entirely normal given that hand dominance and repetitive use patterns typically differ between the two hands. It's a helpful reminder that both hands are worth mentioning to your clinician, even if only one currently bothers you, since early involvement of the second hand can sometimes be picked up before it becomes troublesome.
What does it feel like?
The classic pattern is tingling, numbness or a burning sensation in the thumb, index finger, middle finger and half of the ring finger, typically worst at night and often relieved by shaking the hand vigorously — sometimes called the “flick sign,” which many patients describe doing instinctively before they've ever heard the term. As the condition progresses without treatment, people often notice weakness or clumsiness, dropping objects more frequently, or struggling with fine tasks like doing up buttons or picking up small items. In longer-standing, more severe cases the small muscle at the base of the thumb can visibly waste away, which is an important sign that treatment shouldn't be delayed any further.
Conditions that can look similar
A few other conditions can cause similar hand symptoms and are worth distinguishing from straightforward carpal tunnel syndrome. Cervical radiculopathy, caused by nerve compression in the neck, can cause tingling and numbness in the hand but usually follows a different pattern that doesn't spare the little finger in the same way, and often comes with neck pain or symptoms that change with neck position. Peripheral neuropathy, often related to diabetes or other systemic conditions, tends to cause symptoms in both hands and feet in a more widespread, glove-and-stocking pattern rather than the specific median nerve distribution of carpal tunnel syndrome. Thoracic outlet syndrome, involving compression of nerves and blood vessels near the collarbone, can cause arm and hand symptoms too, but usually with a different pattern and additional features such as changes in the arm with overhead activity, alongside possible colour or temperature changes in the hand that aren't typical of carpal tunnel syndrome. Because carpal tunnel syndrome has such a specific and recognisable symptom map, a careful history often points strongly towards the diagnosis before any hands-on testing even begins. A careful history remains the single most useful diagnostic tool in most cases, even when other tests are also used to confirm the picture.
How we assess it
We'll ask in detail about the pattern of your symptoms — which fingers are affected, and specifically when the symptoms tend to occur — because that map is genuinely very telling and often points towards the diagnosis on its own. On examination we use gentle provocation tests at the wrist, such as holding the wrist in a flexed position or tapping directly over the nerve, to try to reproduce the tingling, and we'll check the sensation and strength in the hand carefully, looking specifically for any wasting of the thumb muscles that would suggest a more established case. We'll also screen the neck, since a trapped nerve there can occasionally mimic or add to genuine carpal tunnel symptoms and needs to be considered in the overall picture. In some cases a nerve conduction test is arranged, usually by referral, to confirm the diagnosis definitively and gauge exactly how severe the nerve compression currently is, which can also help guide decisions about treatment.
How it's treated
For mild to moderate symptoms, non-surgical treatment is the sensible and well-supported first step (AAOS, 2024). The best-supported single measure is a splint that holds the wrist in a neutral position, worn at night, which keeps pressure off the nerve during the many hours of sleep when the wrist can otherwise curl into a flexed position without you realising it (Karjalainen et al., 2023). Alongside that, adjusting how you use the hand and wrist during waking hours — taking regular breaks from sustained gripping, adjusting a keyboard and mouse setup, or changing how a tool is held at work — makes a genuinely real and measurable difference for many people.
We can add gentle nerve-gliding exercises, which are specific, low-load movements designed to help the median nerve move freely within the tunnel and through the forearm rather than becoming tethered or irritated in one spot, alongside hands-on treatment of the forearm muscles and advice on your workstation and daily habits more broadly. The evidence base for these particular extras is more modest than for splinting, but they're low-risk, generally comfortable to perform, and can meaningfully help with overall function and comfort as part of a broader plan. What we're always careful never to do is needle or work directly into the tunnel itself, over the nerve, given how sensitive and superficial it sits in that specific location.
It's important to know clearly when conservative care isn't likely to be enough on its own. If symptoms are already severe, are clearly and steadily worsening despite appropriate treatment, or there's already visible wasting or persistent weakness in the thumb muscles, a surgical opinion becomes appropriate at that point — a carpal tunnel release, which surgically widens the tunnel to take pressure off the nerve, is a well-established, generally very successful procedure that reliably relieves the compression. Acting before the nerve has been significantly and potentially permanently affected consistently gives the best long-term results, which is why persistent or worsening numbness shouldn't simply be lived with indefinitely.
Understanding severity and why timing matters
Carpal tunnel syndrome is often described in terms of mild, moderate and severe stages, and understanding roughly where you sit can help make sense of the treatment options being discussed. Mild cases typically involve intermittent tingling and numbness, usually worse at night, without any measurable weakness or muscle changes — these respond particularly well to splinting and activity modification alone. Moderate cases involve more frequent, sometimes constant sensory symptoms and the beginnings of measurable changes on nerve conduction testing, though usually still without visible muscle wasting. Severe cases involve constant numbness, clear weakness, and visible wasting of the thumb muscles, and are the group most likely to need surgical treatment to achieve a good outcome.
This staging matters because the nerve's capacity to recover fully diminishes the longer it remains significantly compressed, particularly once muscle wasting has set in. This is precisely why persistent or worsening symptoms shouldn't be managed indefinitely with self-care alone if they aren't improving — earlier, appropriately-escalated treatment generally gives a better long-term outcome than a prolonged wait-and-see approach once things are clearly progressing. Nerve conduction testing, where available, can also help quantify severity objectively and is often used to guide the timing of a surgical referral if conservative treatment isn't working as expected.
What you can do yourself
Try a neutral-wrist night splint as a first step — it's inexpensive, low-risk, widely available, and often the single most helpful thing you can do early on in managing this condition yourself. Adjust the specific activities that clearly provoke your symptoms where you reasonably can, take regular short breaks from sustained gripping or repetitive hand movements throughout the day, and set up your workstation, including keyboard and mouse position, to keep your wrist in a comfortable, neutral position rather than bent up or down. Gentle nerve-gliding exercises can be a useful addition to your self-management once you've been shown the correct technique by a clinician, since doing them incorrectly can occasionally aggravate rather than help symptoms.
When to seek help
See a clinician if the tingling is a regular, recurring feature, is disturbing your sleep on a consistent basis, or is starting to affect your grip and general hand function in daily tasks. Seek review sooner rather than later if you notice constant, unrelenting numbness, genuine weakness, or any visible wasting of the muscle at the base of the thumb, as these features suggest the nerve needs more urgent and thorough attention rather than a wait-and-see approach.
Frequently asked questions
Will wearing a splint during the day help too? It can, particularly during activities that clearly provoke your symptoms, though most of the strongest evidence relates specifically to night-time use, when the wrist is most likely to curl into a flexed, nerve-compressing position without your awareness.
Can carpal tunnel syndrome go away on its own? Mild cases, particularly those related to a temporary cause such as pregnancy, can improve or resolve on their own or with simple splinting. More established or severe cases are less likely to resolve completely without some form of active treatment.
Is surgery a last resort, or a reasonable early option? For mild to moderate symptoms, conservative treatment is the sensible first step. For more severe or rapidly progressing cases, particularly with muscle wasting, surgery may reasonably be discussed earlier rather than delaying, since waiting too long can affect the completeness of recovery.
At BPR we'll confirm it's carpal tunnel syndrome rather than a look-alike condition, get you set up promptly with the right splinting and self-management strategy, and advise you clearly and honestly on when a surgical opinion is genuinely worth seeking. You can book an assessment at bpr.rehab.
References
American Academy of Orthopaedic Surgeons (AAOS) (2024) Management of carpal tunnel syndrome: evidence-based clinical practice guideline. Rosemont, IL: AAOS.
Karjalainen, T.V., Lusa, V., Page, M.J. et al. (2023) 'Splinting for carpal tunnel syndrome', Cochrane Database of Systematic Reviews, 2, CD010003.
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: July 2026).