Carpal tunnel syndrome
Also called: carpal tunnel, CTS, trapped nerve in the wrist, numb tingling fingers at night. Clinical name: Carpal tunnel syndrome (median nerve compression at the wrist).
Mild carpal tunnel often improves with 4–8 weeks of night splinting; injections help when splints are not enough. Constant numbness, weakness or thumb-muscle wasting are the signs it needs surgical review.
What it actually is
Carpal tunnel syndrome is what happens when the median nerve, which runs into the hand through a narrow passage at the wrist alongside nine tendons, gets squeezed. The classic result is tingling and numbness in the thumb, index and middle fingers, worst at night, relieved at first by shaking the hand out, the wake-and-shake that almost everyone with this condition describes.
It is extremely common, more so in women, in pregnancy, and in anyone whose hands do forceful repetitive work. Left alone, mild cases can drift for years as an annoyance; the concern is the slow-progression path where tingling becomes constant numbness, grip weakens, and the muscle pad at the base of the thumb visibly thins. Nerves object to being compressed for years, and the late findings do not always reverse, which is why the severe end of this condition is treated with more urgency than its everyday reputation suggests.
The treatment ladder is refreshingly clear. A night splint holding the wrist straight is the first rung and fixes or improves a large share of mild cases within weeks. A corticosteroid injection is the common second rung. And carpal tunnel release surgery, one of the most frequently performed and most reliably successful operations there is, sits at the top for cases that persist or arrive already severe. Tracking nights woken, fingers affected and what the splint changes turns the will-we-won’t-we surgical conversation into one grounded in actual numbers.
How bad is it?
Carpal tunnel syndrome is usually described as mild, moderate or severe by how the median nerve is behaving. Mild: intermittent night-time tingling in the thumb, index and middle fingers that shaking the hand relieves. Moderate: symptoms spilling into the day, provoked by driving, phones and typing, with clumsiness creeping in. Severe: constant numbness, weakness of grip and pinch, and visible thinning of the muscle pad at the base of the thumb. That last group is the one where delay costs, because long-compressed nerves and wasted muscle recover slowly and sometimes incompletely.
How long will it take?
Recovery moves in phases. This is the typical shape of it — yours may run faster or slower, and the numbers below are general ranges, not a forecast for your specific injury.
When to get it looked at
Most cases settle with time and sensible loading. Get it assessed by a professional if any of these apply — they can point to something that needs hands-on care:
- Constant numbness rather than tingling that comes and goes
- Visible wasting or flattening of the muscle pad at the base of the thumb
- Rapidly progressive weakness, or dropping things regularly
- Symptoms in both the hand and forearm with neck pain (may be a neck problem rather than the wrist)
- Numbness after a wrist injury or fracture, that is a different urgency, seek assessment promptly
This is a list of warning signs, not a diagnosis. If you are worried, or the pain is severe, see a GP, physiotherapist or urgent care.
What to track while you recover
Carpal tunnel decisions, splint on, inject, operate, hinge on how often and how hard symptoms hit over weeks. A nightly note beats guessing at the consultation, and makes the trend under splinting obvious.
- Nights woken by tingling or numbness, and how many times
- Which fingers: classically thumb, index, middle and half the ring finger, note if it differs
- Daytime episodes and what triggered them: phone, driving, typing, tools
- Splint worn or not that night (the comparison is the point)
- Any dropping of objects, clumsiness with buttons, or weakness of pinch
This is exactly what InjuryLog does.
Log each of these in seconds, watch the trend build day by day, and keep every scan and receipt tied to this one injury. Free on iOS, Android soon.
Wondering how long yours will take? Try the free recovery time estimator for a typical, phased timeline by injury and severity.
What to tell your physio
Whether you see a GP, physio or hand specialist, the questions are the same, and your log answers most of them: which fingers, how often, what provokes it, and what the splint changed.
- Exactly which fingers tingle or go numb, and whether the little finger is spared (it usually is in CTS)
- How many nights a week it wakes you, and whether shaking the hand relieves it
- How long it has been going on and whether it is stable, improving or progressing
- What the night splint changed over three to four weeks of honest use
- Your work and hobby hand demands, and any weakness or dropping of objects
Walk in with the whole picture.
InjuryLog turns your daily logs into a clean Physio Visit Pack, a one-page summary your physio can actually read, so the first appointment starts with facts, not guesswork.
The questions people actually ask
Does carpal tunnel syndrome go away on its own?
Mild cases can, particularly when a temporary driver is involved: carpal tunnel in pregnancy commonly settles after birth, and symptoms provoked by an unusually intense spell of hand work may ease when the load does. Established symptoms, though, tend to persist or slowly progress without treatment. The encouraging part is that the first-line treatment is cheap and unintrusive, a night splint for a few weeks, so waiting to see rarely needs to mean doing nothing.
Why is carpal tunnel worse at night?
Most people sleep with their wrists curled, and a bent wrist narrows the carpal tunnel and squeezes the median nerve; add the slight fluid shifts of lying down and the night becomes the nerve's worst shift. That is why waking with tingling that you shake out is the classic story, and why a night splint holding the wrist straight is the standard first treatment: it removes the position that provokes the nerve for eight hours at a stretch.
How long should I wear a splint for carpal tunnel?
Standard advice is to wear a wrist splint at night for at least four weeks before judging it, keeping the wrist in a neutral, straight position. Many people notice better nights inside a fortnight. If four to eight weeks of honest use has not moved the symptoms, that is useful information rather than failure, it is the point at which a clinician would consider an injection or nerve testing. Daytime wear can help during provocative tasks but is not usually required around the clock.
Which fingers go numb with carpal tunnel?
The median nerve supplies the thumb, index finger, middle finger and the thumb side of the ring finger, so that is where carpal tunnel tingling and numbness live. The little finger is supplied by a different nerve and is characteristically spared; numbness that includes the little finger points towards a different nerve or the neck. Noting exactly which fingers are affected, each time, is genuinely useful diagnostic information to bring to an appointment.
When does carpal tunnel need surgery?
The usual triggers are symptoms that persist despite splinting and, often, an injection; moderate to severe findings on nerve conduction tests; or the warning signs of a struggling nerve, constant numbness, weak pinch and grip, or wasting of the thumb-pad muscles. Carpal tunnel release is a short operation with high success rates, and night symptoms often improve within days. The reason clinicians do not leave severe cases to drift is that a nerve compressed too long, and muscle already wasted, may never fully recover even after a technically perfect operation.
Is carpal tunnel caused by typing?
Typing gets more blame than the evidence supports. The strongest associations are with forceful, repetitive gripping and vibrating tools, plus non-work factors: pregnancy, diabetes, thyroid problems, wrist shape and prior fracture. Ordinary keyboard work is at most a modest contributor, though long sessions with wrists bent over a laptop edge can certainly provoke symptoms in a nerve that is already irritable. Sensible workstation tweaks help comfort; they are just rarely the whole story.
Sources
- Carpal tunnel syndrome — NHS
- Carpal Tunnel Syndrome — AAOS OrthoInfo