Overview
what it is and why it mattersDe Quervain's tenosynovitis is irritation and swelling of two thumb tendons that share a tight tunnel just above the wrist on the thumb side. Repeated pinching, gripping, or lifting can inflame the tendons and the tunnel they pass through, and the swelling makes every thumb motion painful. New parents see it often from lifting infants, and it is so common it has been nicknamed mommy thumb.
The hallmark is sharp pain right over the bony bump on the thumb side of your wrist (the radial styloid), often with visible swelling, made worse by moving the thumb or bending the wrist toward the thumb side.
Symptoms
what you may noticeThe main symptom is sharp pain right over the bony bump on the thumb side of your wrist (the radial styloid) that flares every time you grip, pinch, or twist. Picking up a coffee mug, turning a doorknob, wringing out a washcloth, anything that loads the thumb tendons reproduces it. New parents often notice it first when lifting their baby with the wrists angled inward.
You may see visible swelling or a small fluid-filled bump over the tendon tunnel at the wrist. In more established cases the tendons can develop a catching or squeaking sensation as they slide through the narrowed tunnel. The pain sometimes radiates up the forearm or down into the thumb, and grip strength drops noticeably because the pain prevents you from squeezing hard.
Diagnosis
exam first, imaging secondA focused physical exam of the wrist and thumb reproduces the pain right at the radial styloid. Ultrasound can show the swollen tendon sheath and is also useful for guiding the injection. X-rays are added to rule out arthritis at the wrist or thumb base, which can mimic the symptoms.
How We Treat It
what we try first, in orderMost cases of De Quervain's settle with non-operative care. The treatments below are listed in the order we usually introduce them, each one added on top of the ones before, not instead of. The goal early on is to quiet the inflamed tendon sheath and take the load off the thumb tendons so they can calm down.
1
Thumb Spica Splinting
A thumb spica splint, one that immobilizes both the wrist and the thumb, gives the inflamed tendon sheath a chance to settle. Worn most of the time during the acute phase.
2
Activity Modification
Avoid the moves that drove the inflammation: repetitive pinching, lifting with your wrist bent toward the pinky side, and repeated thumb motions through the day.
3
Corticosteroid Injection
A corticosteroid injection into the inflamed tunnel, guided in real time by ultrasound for accuracy, is highly effective and often cures the condition in a single shot.
Anti-Inflammatory Pills and Ice
NSAIDs like ibuprofen and ice work as adjuncts for acute pain control alongside the splint, not as a stand-alone fix.
Surgical Options
if non-operative care isn't enoughSurgery is reserved for cases where two injections have not worked, or where the tunnel itself has thickened so much from chronic irritation that injections cannot help, a quick procedure to release the roof of the tunnel and free the tendons.
Providers Who Treat De Quervain's Tenosynovitis
sports-medicine team
Frequently Asked
questions we hear in clinicWhy is this called “mommy thumb”?
Because new parents see it constantly from lifting infants, usually with the wrists angled inward. Repeated lifting like that pinches the two thumb tendons in their tunnel, and it is so common in that group that the nickname stuck. You do not have to be a new parent to get it, though, any repeated pinching, gripping, or lifting can set it off.
Where exactly is the pain?
Right over the bony bump on the thumb side of your wrist, called the radial styloid. The pain flares every time you grip, pinch, or twist, picking up a mug, turning a doorknob, wringing out a washcloth. It sometimes radiates up the forearm or down into the thumb.
Do I need an X-ray or a scan?
The diagnosis is usually made from a focused in-office exam of the wrist and thumb that reproduces the pain at the radial styloid. Ultrasound can show the swollen tendon sheath and helps guide the injection, and X-rays are added to rule out arthritis at the wrist or thumb base, which can mimic the symptoms.
Does the cortisone shot actually fix it?
Often, yes. A corticosteroid injection into the inflamed tunnel, guided in real time by ultrasound for accuracy, is highly effective and frequently cures the condition in a single shot.
Will I need surgery?
Rarely. Surgery is reserved for cases where two injections have not worked, or where the tunnel itself has thickened so much from chronic irritation that injections cannot help. When it is needed, it is a quick procedure to release the roof of the tunnel and free the tendons.
What can I do on my own to help?
Avoid the moves that drove the inflammation: repetitive pinching, lifting with your wrist bent toward the pinky side, and repeated thumb motions through the day. A thumb spica splint that holds both the wrist and the thumb still gives the tendon sheath a chance to settle, and anti-inflammatory pills like ibuprofen plus ice can help with acute pain alongside the splint.
Further Reading
authoritative sourcesExternal patient-education references and related OSI pages for additional background: