Numbness and tingling in the hands, called paraesthesia, is one of the most common reasons people come to see us, and one of the most misunderstood. Almost everyone who feels pins and needles in their fingers assumes it is carpal tunnel syndrome. Often it is. But just as often it is a different nerve, compressed at a completely different place, and sometimes the real source is not in the hand or wrist at all, but up in the neck. Getting that distinction right is the difference between treatment that works and treatment that misses the target entirely.
The good news is that the hand is beautifully wired, and that wiring is predictable. Three main nerves supply it, and each one owns a specific territory of skin and a specific set of muscles. Where you feel the numbness, which fingers are involved, and what has gone weak all point precisely to which nerve is irritated and where it is being pinched. Reading that map accurately is the first and most important job, and it is exactly what a thorough myotherapy assessment is built to do.
Numbness is a message, and it is surprisingly specific. The fingers that tingle, the grip that fails, the movement that makes it worse: together they map straight back to a single nerve at a single point of compression. Read the map correctly and the treatment almost writes itself.
Most hand numbness is a nerve compression that responds well to treatment, but a few patterns deserve prompt medical assessment. See a doctor without delay if you have rapidly worsening weakness or visible muscle wasting in the hand, numbness in both hands (or hands and feet together, which can point to a systemic cause such as diabetes or a vitamin deficiency), symptoms that follow a significant injury, or sudden weakness, facial droop, slurred speech or numbness spreading up the arm, which needs emergency care and a call to triple zero (000).
Long-standing carpal tunnel with constant (not just intermittent) numbness and thumb-muscle wasting also shouldn’t be left indefinitely, as a medical or surgical opinion may be needed. We assess carefully for these signs and will always refer on when that is the right call. The rest of the time, hands-on treatment is a genuinely effective first option.
Which fingers are affected: the three nerves of the hand
This is the single most useful piece of self-knowledge you can have about hand numbness. Each of the three nerves supplies a different part of the hand, so the pattern of affected fingers is the clearest clue to which nerve is involved.
Nerve 1
Median
Thumb, index, middle & half the ring
Supplies the palm side of the thumb, index, middle, and the thumb-side half of the ring finger. This is the classic carpal tunnel territory. Symptoms are often worse at night and flick the hand awake. Weakness shows up in the thumb, in pinching and gripping, and in the muscle pad at the base of the thumb.
Nerve 2
Ulnar
Little finger & half the ring
Supplies the little finger and the outer half of the ring finger. Most often irritated at the elbow (the “funny bone”, or cubital tunnel), less often at the wrist. Produces tingling in those two fingers, a weakening grip, difficulty spreading and closing the fingers, and clumsiness with fine tasks.
Nerve 3
Radial
Back of the hand & thumb web
Supplies the back of the hand and the web between thumb and index finger, and drives the muscles that lift the wrist and fingers. Radial problems tend to show as weakness more than numbness, classically a “wrist drop” where the wrist cannot be held up, often after sustained pressure on the upper arm.
Here is what most people are never told: the nerves that run to your hand do not begin at your wrist. They begin at your neck, branching off the spinal cord between the vertebrae before travelling down through the shoulder, arm and forearm to reach the fingers. Irritation of a nerve root in the neck, from a stiff or compressed segment of the cervical spine, can produce numbness and tingling that is felt all the way down in the hand, following the map of whichever root is affected. The C6 root refers to the thumb side, C7 to the middle finger, and C8 to the little-finger side.
This matters enormously, because a neck-driven problem will never fully resolve if you only ever treat the wrist. It gets more interesting still. There is a well-recognised pattern called double crush, where a nerve that is already irritated at the neck becomes far more vulnerable to a second compression further down, such as at the carpal tunnel. Cervical involvement is notably more common in people with carpal tunnel than in the general population. In practice this means the neck and the wrist are frequently part of the same story, and it is one reason a hand that has been treated at the wrist alone sometimes never quite settles. When we assess numb hands, we always check the neck.
This is also where the way nerves actually move becomes central. A nerve is not a fixed wire. It is living, mobile tissue that copes with movement by gliding, sliding smoothly through the muscles and fascia around it as you move your neck, shoulder, elbow and wrist. Nerves tolerate only a little stretch; their real freedom comes from this gliding motion. When tissue anywhere along the path stiffens, or a segment of the neck loses its normal movement, the nerve loses its ability to glide freely and becomes sensitised and symptomatic. Restoring that glide, along the whole length of the nerve from neck to hand, is one of the most powerful things manual therapy can do for tingling hands.
A nerve runs from your neck to your fingertips, and it needs to glide freely along that entire path. Pinch it at the neck, tether it at the wrist, or stiffen the tissue anywhere in between, and the message that arrives at your hand is numbness. Free the whole pathway and the signal clears.
Guessing wastes time; assessment saves it. A thorough myotherapy assessment pinpoints which nerve is involved and where it is compressed, so treatment targets the real source from day one. Book an assessment at MyoFitness. No referral required.
This is the real question in the title, and the honest answer is that it could be any of the following, which is exactly why an accurate assessment matters before treatment begins. Here are the usual culprits behind a numb, tingling hand.
Thumb, index, middle and half the ring finger. Worse at night, eased by shaking the hand. Weak pinch and thumb. The most common cause, and highly responsive to hands-on treatment.
Little finger and half the ring finger, often with an aching inner elbow. Worse with a bent elbow, such as on the phone or while sleeping. Weakening grip and fiddly-task clumsiness.
Back of the hand and forearm, more weakness than numbness, sometimes a drooping wrist. Often follows sustained pressure on the upper arm or repetitive forearm loading.
Numbness that maps to a nerve root rather than a hand nerve, often with neck, shoulder or upper-arm symptoms. Can drive or worsen a wrist problem through the double-crush pattern.
Both hands, or hands and feet in a glove-and-stocking pattern, can point to a whole-body cause such as diabetes, thyroid dysfunction or a vitamin deficiency. This warrants a medical work-up alongside hands-on care.
Compression of the nerves and vessels between the neck and shoulder can produce arm and hand numbness, often positional and worse with the arm raised or carrying loads. Posture and soft tissue are frequently involved.
The MyoFitness Yarraville clinic at 231 Hyde Street is accessible from across the inner west. All of the following suburbs are within easy reach of the clinic.
MyoFitness also operates clinics in North Melbourne at 154 Peel Street and Surrey Hills at 296A Canterbury Road. All three clinics offer Watson Headache® Approach assessment and treatment for migraine.
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Every session begins with a clinical assessment. Treatment is directed at the actual cause of your pain, not just the location where you feel it.
Carpal tunnel syndrome is the best known of these conditions for good reason: it is the most common. It happens when the median nerve is compressed as it passes through the carpal tunnel, a narrow passage at the front of the wrist bounded by bones and a tight band of ligament, sharing that tight space with nine tendons. Anything that crowds the tunnel, swelling, fluid retention, repetitive gripping and wrist loading, or thickening of the tissues, squeezes the nerve and sets off the symptoms.
