Carpal Tunnel Syndrome: Why Your Hands Go Numb at Night and What Helps

Published August 2026 · 9 min read · By the Circle Physiotherapy Clinical Team

Medically reviewed August 2026 by registered physiotherapists at Circle Physiotherapy Brampton.

Quick answer: Carpal tunnel syndrome happens when the median nerve is compressed as it passes through a narrow passage on the palm side of the wrist called the carpal tunnel. Symptoms are often worse at night because the wrist tends to curl or bend while sleeping, which raises pressure inside the tunnel and squeezes the nerve further — many people wake up and shake their hand to get relief. The classic pattern affects the thumb, index, middle, and half of the ring finger, while the little finger is spared. At Circle Physiotherapy in Brampton, non-surgical care such as splinting, nerve gliding, and activity changes is usually the first step, with surgery reserved for select cases.

If you've been waking up at 2 a.m. shaking out a numb hand, you're not imagining it and you're not alone. Carpal tunnel syndrome is one of the more common nerve compression problems physiotherapists see, and it has a fairly predictable pattern once you know what to look for. This article walks through why the symptoms hit at night, which fingers are involved and why that matters, what else could be causing similar symptoms, what genuinely helps without surgery, and when surgery becomes the right conversation to have with a physician.

What Is Carpal Tunnel Syndrome, and Why Do Symptoms Flare Up at Night?

Carpal tunnel syndrome is compression of the median nerve as it travels through a narrow tunnel formed by the wrist bones and a tough ligament (the transverse carpal ligament) on the palm side of the wrist. That tunnel also carries several tendons, so there isn't much spare room — any swelling, thickening, or positional change inside it can press on the nerve.

Nighttime is often the worst time for symptoms for a simple mechanical reason: most people sleep with their wrists bent, either curled forward or backward, sometimes tucked under a pillow or their own body weight. Bending the wrist in either direction shrinks the space inside the carpal tunnel and increases pressure on the median nerve. Lying down can also shift fluid toward the hands, adding a little extra pressure on top of that.

The result is a familiar routine for many people with carpal tunnel syndrome: waking up with numbness, tingling, or a burning sensation, and shaking or flicking the hand out to try to relieve it. Clinicians sometimes call this the "flick sign," and while it's not a diagnosis on its own, it's a strong clue that points toward carpal tunnel involvement.

Which Fingers Go Numb With Carpal Tunnel Syndrome?

Carpal tunnel syndrome has a distinctive symptom pattern: numbness and tingling in the thumb, index finger, middle finger, and half of the ring finger, while the little finger stays normal. This pattern exists because the median nerve supplies feeling to that specific portion of the hand, while a different nerve — the ulnar nerve — supplies the little finger and the other half of the ring finger.

This distinction matters more than it might seem. If your little finger is going numb along with the others, or if the little finger is numb and the thumb isn't, that points away from carpal tunnel syndrome and toward a different nerve being involved. Paying attention to exactly which fingers are affected is one of the simplest and most useful things you can tell a clinician, because it narrows down the possible causes before any physical testing even begins.

Could Something Other Than Carpal Tunnel Syndrome Be Causing These Symptoms?

Several other conditions can cause hand numbness and tingling that gets mistaken for carpal tunnel syndrome, which is why an accurate assessment matters before starting treatment. A nerve irritated in the neck can refer numbness and tingling down the arm into the hand, and this pattern doesn't always follow the median nerve's specific finger distribution.

• Cervical (neck) nerve irritation: a compressed or irritated nerve root in the neck can send numbness, tingling, or pain down the arm, sometimes reaching the hand in a pattern that overlaps with or mimics carpal tunnel syndrome.
• Cubital tunnel syndrome: compression of the ulnar nerve at the elbow, causing numbness on the little-finger side of the hand rather than the thumb side.
• Thoracic outlet syndrome: compression of nerves or blood vessels near the collarbone and first rib, which can cause diffuse arm heaviness, tingling, or swelling.
• General tendon irritation: tendinopathy around the wrist and thumb can cause pain and reduced grip that feels similar to nerve symptoms but has a mechanical rather than nerve-based cause.

Because these conditions can overlap or occur together, a proper assessment looks at the neck, shoulder, elbow, and wrist as a whole rather than assuming the wrist is automatically the source.

What Causes Carpal Tunnel Syndrome?

Carpal tunnel syndrome develops when something reduces the space inside the carpal tunnel or increases pressure on the median nerve, and several factors can contribute to this at once. Repetitive forceful gripping and exposure to vibration, such as with certain hand tools, are commonly linked to carpal tunnel syndrome, as are jobs or hobbies involving sustained or awkward wrist positions held for long periods.

• Repetitive gripping tasks and vibrating power tools
• Prolonged or awkward wrist positions held for extended periods
• Pregnancy-related fluid retention, which can temporarily increase pressure in the tunnel
• Diabetes and thyroid conditions, which can affect nerve health and tissue swelling
• A previous wrist fracture, which can alter the shape of the tunnel or the structures inside it — see our guide on wrist injury recovery for related information

Keyboard use gets blamed for carpal tunnel syndrome often, but the evidence here is more nuanced than the common assumption. Typing itself doesn't appear to be a strong standalone cause the way heavy vibration or forceful gripping is; what seems to matter more is sustained wrist extension or awkward positioning over long stretches, which is why desk setup and posture can still play a role even if the keyboard isn't the sole cause.

Can Carpal Tunnel Syndrome Be Treated Without Surgery?

Yes — many cases of carpal tunnel syndrome, particularly when caught early, respond well to non-surgical treatment. A structured conservative approach is usually tried first before surgery is even discussed, and physiotherapy plays a central role in that process.

• Night splinting in a neutral position: often the single highest-value early step, since it stops the wrist from curling into positions that raise pressure on the nerve while you sleep. Custom and off-the-shelf options can both be discussed through our bracing services.
• Activity and ergonomic modification: adjusting how tasks are done, tool grip size, and workstation setup to reduce sustained load on the wrist.
• Nerve gliding exercises: gentle, specific movements that encourage the median nerve to slide smoothly through the tunnel and surrounding tissues, rather than staying pinned in one spot.
• Grip and forearm strengthening: once irritation settles, building strength and endurance in the forearm and hand muscles to better tolerate daily demands.
• Addressing the neck if involved: when a neck component is contributing to arm symptoms, treating that alongside the wrist tends to give better results than treating the wrist alone.

Some patients also find acupuncture helpful as part of a broader pain management plan; at Circle Physiotherapy, this can be provided by Dr. Thessa Prashad, DC, who is certified in Contemporary Medical Acupuncture through McMaster University. As with any treatment, results vary from person to person, and there's no guaranteed outcome — a proper assessment helps determine which combination of these approaches makes sense for you.

When Is Carpal Tunnel Surgery the Right Call?

Surgery for carpal tunnel syndrome is generally considered when symptoms are severe, constant, or not improving despite a genuine trial of conservative treatment. Specific signs that tip the conversation toward surgery include numbness that is constant rather than coming and going, visible wasting of the muscle at the base of the thumb, and failure to improve after a proper period of splinting, activity modification, and physiotherapy.

Is Carpal Tunnel Syndrome Covered Under WSIB in Ontario?

Carpal tunnel syndrome can qualify as a work-related injury under WSIB in Ontario when it's connected to job duties such as repetitive gripping, vibration exposure, or sustained awkward wrist postures, though each claim is assessed individually by WSIB. If your symptoms started or worsened because of work tasks, you can report it to your employer and file a claim, and treatment can often begin while the claim is being processed.

Circle Physiotherapy in Brampton direct bills WSIB for eligible claims, which means many patients don't need to pay out of pocket and wait for reimbursement. Coverage specifics still depend on your individual claim, approved funding, and WSIB's own review process, so it's worth confirming details directly with the clinic and your WSIB case manager.

What Desk and Tool Setup Changes Help Reduce Wrist Strain?

Small changes to how a desk or tool is set up can meaningfully reduce sustained pressure on the wrist, even though setup alone rarely fixes carpal tunnel syndrome on its own. The goal is generally to keep the wrist in a neutral, straight position rather than bent up, down, or to the side for long stretches.

• Position the keyboard and mouse so wrists stay straight rather than angled upward or resting on a hard edge
• Choose tool handles with a grip size and shape that don't force an overly tight or awkward hold
• Use anti-vibration gloves or padding for tools that vibrate heavily
• Take short microbreaks to change hand position rather than holding one posture for hours
• Review your overall chair, monitor, and desk height — see our full desk posture guide for a broader setup checklist

What Red Flags Mean I Should See a Clinician Right Away?

Certain symptoms suggest carpal tunnel syndrome has progressed or that something else needs urgent attention, and shouldn't be managed with a wait-and-see approach. These include numbness that has become constant rather than intermittent, visible thinning or wasting of the muscle at the base of the thumb, genuine weakness that causes you to drop objects, and sudden onset of symptoms right after an injury or trauma to the wrist.

How Does Circle Physiotherapy Assess and Treat Carpal Tunnel Syndrome in Brampton?

Circle Physiotherapy in Brampton assesses suspected carpal tunnel syndrome with a hands-on evaluation of the wrist, hand, elbow, and neck, since symptoms in the hand don't always originate in the wrist alone. This typically includes reviewing your symptom pattern, testing sensation and strength, and using simple provocation tests that can reproduce tingling when the median nerve is compressed.

From there, a plan is built around what's actually driving your symptoms — which may include splinting guidance, nerve gliding and strengthening exercises, ergonomic advice for work or hobbies, and addressing any neck or elbow contribution. Ontario allows direct access to physiotherapy, meaning you don't need a doctor's referral to book, though some insurers still ask for one on file for reimbursement purposes.

The clinic offers a free initial consultation and direct billing to most major insurers as well as WSIB, and is open seven days a week at 10725 McLaughlin Rd, Unit #5, Brampton, with free on-site parking, making it easier to fit an assessment around a work or family schedule.

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