De Quervain’s tenosynovitis is a painful condition affecting two tendons on the thumb side of your wrist. It develops when the protective covering around these tendons thickens, squeezing them inside a narrow tunnel at the base of the wrist and making it painful to grip, pinch, or turn your wrist. Women are affected at roughly five times the rate of men, with about 2.8 cases per 1,000 person-years in women compared to 0.6 in men.
What Happens Inside Your Wrist
Two tendons run side by side from your forearm to your thumb, passing through a snug tunnel at the wrist made of bone and a tough band of tissue. One tendon pulls your thumb away from your hand, and the other straightens it at the knuckle. In de Quervain’s, the sheath surrounding these tendons thickens and develops abnormal fibrous tissue and new blood vessels. This isn’t the kind of sharp inflammation you’d get from an infection or a cut. Instead, it’s a gradual degenerative process where the sheath slowly builds up extra tissue in response to repeated stress.
As the sheath thickens, the tunnel shrinks. The tendons can no longer glide smoothly, and every movement that involves your thumb, especially gripping or twisting, creates friction and pain at the side of your wrist near the bony bump (the radial styloid). Some people also feel a catching or snapping sensation when they move their thumb.
Common Causes and Risk Factors
The exact trigger isn’t fully understood, but repetitive hand and wrist motions are the clearest contributor. Any activity that demands repeated gripping, wringing, or pinching can overload the tendon sheath over time. This includes gardening, racquet sports, lifting heavy objects with your thumbs extended, and sustained phone or device use.
Pregnancy and the postpartum period carry particular risk. Fluid retention during pregnancy can swell the tissue inside the tunnel, and hormonal shifts involving estrogen, progesterone, and prolactin may make the tendon sheath more susceptible to thickening. After delivery, the constant wrist strain of lifting, supporting, and feeding a newborn adds a mechanical load on top of those hormonal changes. The condition is sometimes called “mommy thumb” for this reason.
Age matters, too. People over 40 develop de Quervain’s at roughly three times the rate of those under 20.
What It Feels Like
The hallmark symptom is pain at the thumb side of the wrist, right over or just below the bony bump. It typically comes on gradually and worsens with any motion that involves your thumb. Turning a doorknob, wringing out a washcloth, picking up a child, or scrolling on your phone can all trigger a sharp ache. Some people notice swelling along the side of the wrist, and the area is usually tender to touch. In more advanced cases, you might feel the tendons catching or hear a faint creaking as they struggle to slide through the narrowed tunnel.
Pain often radiates up the forearm or down into the thumb, which can make it hard to distinguish from other conditions. Osteoarthritis at the base of the thumb, ganglion cysts, nerve entrapment, and a condition called intersection syndrome (which affects tendons slightly higher on the forearm) can all cause overlapping symptoms.
How It’s Diagnosed
Diagnosis is usually straightforward in a clinic visit. Your provider will press on the thumb side of your wrist and ask you to move your thumb and wrist in specific directions. The most reliable physical test involves making a fist with your thumb tucked inside your fingers, then bending your wrist away from the thumb side. If this reproduces your pain sharply at the radial styloid, it strongly suggests de Quervain’s. One study found this test to be 100% specific, meaning a positive result is very unlikely to be a false alarm.
Imaging isn’t usually needed. If there’s any doubt, an ultrasound can show thickening of the tendon sheath and help rule out other causes. X-rays are occasionally ordered to check for arthritis at the base of the thumb.
Treatment Without Surgery
Most people improve with conservative treatment, especially when they start early. If you address symptoms within the first six months, the odds of full recovery without surgery are high.
The first step is reducing the load on the affected tendons. A thumb spica splint, which immobilizes your thumb and wrist, takes pressure off the tunnel and lets the irritated tissue calm down. Wearing it consistently, particularly at night and during activities that provoke pain, is more effective than wearing it sporadically. Ice and over-the-counter anti-inflammatory medication can help manage pain in the short term, though the underlying process is more degenerative than inflammatory.
Corticosteroid injections into the tendon sheath are the most effective nonsurgical option. About 52% of people get sufficient relief after a single injection. If a second injection is needed, the cumulative success rate climbs to roughly 73%. When started within the first six months of symptoms, most people recover completely with injections alone. Physical or occupational therapy can complement injections by teaching you how to modify grip patterns, strengthen surrounding muscles, and gradually return to full activity. With early treatment, symptoms typically improve within four to six weeks.
When Surgery Is Needed
If splinting and injections don’t resolve the problem, a minor surgical procedure can release the tight tunnel. The surgery is done as an outpatient procedure under local anesthesia. Through a small incision on the wrist, the surgeon opens the thickened sheath to give the tendons room to move freely again. If there’s a wall of tissue dividing the tunnel into separate compartments (an anatomical variation that makes some people more prone to the condition), that wall is removed as well.
Recovery is relatively quick. Movement is encouraged immediately after surgery, and no splint is typically needed. Most people return to normal activities over the following weeks, though grip strength takes a bit longer to fully return.
Complications are uncommon but possible. The most notable risk is irritation of the small sensory nerve that runs near the surgical site, which can cause temporary numbness or tingling on the back of the thumb and hand. In one long-term study, transient nerve irritation was the most frequent complication, occurring in a small number of cases and resolving on its own. Wound infection and delayed healing are rare.
Conditions That Look Similar
Because thumb-side wrist pain has several possible causes, getting the right diagnosis matters. Osteoarthritis at the base of the thumb (the trapeziometacarpal joint) is the most common mimic, especially in people over 50. It tends to cause a deeper, aching pain with grinding rather than the sharp, tendon-specific pain of de Quervain’s. Intersection syndrome causes pain slightly higher on the forearm, about two to three inches above the wrist. Nerve entrapment along the radial sensory nerve produces burning or tingling rather than the movement-related aching typical of de Quervain’s. Ganglion cysts can press on nearby structures and cause localized wrist pain, but they usually present as a visible or palpable lump.
If your pain doesn’t fit neatly into one pattern, or if it persists after a round of treatment, further evaluation can sort out whether something else is contributing.