Hand & wrist condition
De Quervain’s tenosynovitis is pain on the thumb side of the wrist, caused by two thumb tendons becoming a poor fit for the tight tunnel they pass through. Every time the thumb moves, those tendons drag through a narrowed sheath — which is why gripping, lifting and wringing hurt so sharply, and why it is so common in new parents that it has earned the nickname “mummy’s wrist”. It is a tendon sheath problem, not a joint one, and that distinction matters because arthritis at the base of the thumb causes pain in a similar area but needs quite different treatment. This page explains how to tell them apart, why the right splint matters so much, and why you do not have to wait it out.
Tap any that apply to you — this is guidance, not a diagnosis, but it helps tell an irritated tendon sheath from other causes of thumb-side pain.
That pattern fits De Quervain’s — and it responds well to treatment. The classic picture is thumb-side wrist pain that bites when lifting with the thumb out, with sharp pain on tucking the thumb in and tilting the wrist. An assessment confirms it and, importantly, separates it from arthritis at the base of the thumb, which sits lower and needs a different plan. Most people improve substantially with the right splint and a targeted injection where needed.
If the pain sits lower, right at the joint where the thumb meets the wrist, and grinds when you pinch or turn a key, it may be thumb-base arthritis rather than De Quervain’s. The two are often confused because both hurt on the thumb side. An assessment locates the problem precisely — and that determines which treatment will actually help. More: thumb arthritis
The tunnel is a fixed size, so anything that swells the tendons or thickens the sheath makes the fit too tight:
The highest-value early step is the right splint — one that includes the thumb. This is where most people go wrong: an ordinary wrist brace leaves the thumb free, so the irritated tendons keep gliding through their tight tunnel and nothing changes. A thumb spica splint, which rests the thumb as well as the wrist, is what actually settles it, and worn consistently early on it makes a substantial difference. Alongside that, change how you lift: scoop a baby from underneath with both forearms rather than gripping around the chest with the thumbs out, and keep the wrist straighter when carrying. Ease wringing, twisting and sustained pinching where you can. Do not test the painful movement repeatedly to see whether it still hurts — that keeps the sheath inflamed. And do not conclude you simply have to endure it until the baby is bigger: this condition responds well to treatment now, and there is no benefit in months of unnecessary pain.
The right step depends on your situation — tap the one that fits:
This is the classic setting — and it is very treatable without waiting for the baby to grow. A thumb spica splint plus a change in lifting technique, scooping from underneath with the forearms, relieves most cases. Where that is not enough, a targeted injection works well for this condition. If you are pregnant or breastfeeding, mention it — it shapes the plan rather than blocking it.
A few weeks of thumb-side wrist pain is the right moment to act, before it becomes entrenched. The correct splint and easing the provoking movements settle many cases at this stage. An assessment also confirms it is the tendon sheath rather than thumb-base arthritis, which is the differential that most often gets missed.
First worth checking: was the splint the right one? A plain wrist brace that leaves the thumb free will not settle this, and many people conclude splinting failed when it was never properly tried. If a thumb spica has genuinely been worn consistently without improvement, a targeted injection is very effective, and release surgery is available for the rare case that persists.
De Quervain’s treatment is a short ladder, and surgery sits right at the end of it:
Tap each card to reveal the truth:
It is irritation of two tendons that run to the thumb where they pass through a snug tunnel on the thumb side of the wrist. Those tendons lift and move the thumb away from the hand, and they turn a corner at the wrist inside a tight fibrous sheath. When the sheath thickens or the tendons swell, the fit becomes too tight and every thumb movement drags through a narrowed tunnel — producing pain on the thumb side of the wrist, particularly with gripping, lifting and wringing. It is a tendon sheath problem rather than a joint problem, which is what separates it from arthritis at the base of the thumb.
Because new parents get it so often. Lifting a baby involves scooping with the thumbs held out and the wrists angled — exactly the position that loads these two tendons — and it is repeated dozens of times a day, every day, with a weight that steadily increases. Add the fluid retention and tissue changes that follow pregnancy, and the combination is close to a perfect recipe. It is common enough that the nickname has stuck. It is not confined to mothers, though: fathers, carers, and anyone doing repetitive forceful thumb work can develop exactly the same problem.
They both cause pain on the thumb side, but in different places and with different patterns. De Quervain’s sits at the wrist, roughly where a watch strap would cross the thumb side, and it hurts most when you lift, grip, or bend the wrist with the thumb tucked in. Thumb-base arthritis sits lower, at the joint where the thumb meets the wrist, and it tends to give a deep, grinding ache with pinching, turning keys and opening jars, sometimes with a squaring off of that joint. An examination can usually distinguish them quickly, and it matters because the treatments differ.
Only if it holds the thumb as well. This is the most common practical mistake: an ordinary wrist brace leaves the thumb completely free, so the two irritated tendons keep gliding through their tight tunnel with every thumb movement, and the problem carries on. What is needed is a thumb spica splint, which includes the thumb and rests the tendons properly. Worn consistently, particularly in the early stages, the right splint makes a substantial difference — whereas the wrong one leaves people concluding that splinting does not work.
No — and that is worth saying clearly, because many new parents assume they simply have to endure it. It is true that the load often eases as a baby grows and is lifted differently, and that postpartum tissue changes settle with time. But De Quervain’s responds well to treatment now: the right splint, adjusting how you lift, and, where that is not enough, a targeted injection that is very effective for this condition. Surgery is rarely needed. If you are pregnant or breastfeeding, say so — it is factored into the plan rather than being a barrier to treatment.
Same-day appointments are usually available. Call or book online — our team will take it from there.
