Pain on the thumb side of the wrist is common in new parents.
The short version
- It's often De Quervain's — irritation of two thumb tendons and the tunnel they run through.
- It's usually linked to how often you lift and hold a baby with your thumb stuck out.
- Changing how you lift, resting the thumb in a splint, and adding gentle movement is the usual starting plan.
Why it happens
Two tendons run from your thumb, along the thumb side of your wrist, and through a narrow tunnel near the bony bump at the base of your thumb. In De Quervain's, those tendons and their tunnel become irritated and swollen, so moving the thumb and wrist hurts.
New parents get this a lot, and the reason is mostly mechanical. Think about how you pick a baby up: thumbs out wide, hands under the armpits, wrists tipping towards your little finger as you lift. That exact combination is the position that squeezes those two tendons hardest. Then you do it dozens of times a day, at all hours, often while tired and without much thought about technique. Hormonal changes around pregnancy and breastfeeding are also thought to play a part, though the repeated lifting is the bit you can actually change.
It's worth knowing this isn't caused by doing something wrong. It's a normal tissue response to a sudden, large increase in a specific movement — and that increase is unavoidable when a baby arrives. The good news is the same logic works in reverse: reduce the provoking position and the tendons usually settle.
A clinician may check this with a simple test that puts those tendons on stretch — you tuck your thumb into your palm and tip the wrist. It's a useful examination finding, but it's not something to diagnose yourself with, because other things (thumb joint arthritis, carpal tunnel, a wrist joint problem) can feel similar and are managed differently.
⚠️ When to see a doctor in person
Get emergency care straight away if the hand or fingers suddenly go cold, pale, or numb — this needs urgent assessment, not a routine appointment.
- Get medical help the same day if the wrist or hand is hot, red, swollen, or unusually painful to touch (a fever may or may not be there — it doesn't need to be present for this to be serious), or if you can't move the thumb at all after an injury or fall.
- Book an appointment if the pain doesn't settle after a few weeks of changing how you lift, if there's a lump on the wrist, if the thumb catches or locks, if you're losing grip strength, or if numbness and tingling wake you at night — that last one is more typical of carpal tunnel, which is also common after pregnancy and is managed differently.
- Worth mentioning to a doctor: any joint pain, swelling or long morning stiffness in several joints at once, rather than just the one wrist. That pattern is assessed differently.
Most new-parent wrist pain settles with a few practical changes and time.
What actually helps
Change how you lift, first. This matters more than any exercise. Scoop your baby up with your forearms and open palms underneath rather than gripping under the armpits with your thumbs stuck out. Keep your wrist in a straight line with your forearm instead of tipping it. Bring the baby close to your body before you lift. Use a pillow to take the weight during feeds so you're not holding a fixed position with your thumb for 20 minutes. If bottle feeding, hold the bottle in your palm, not pinched between thumb and fingers.
A splint gives the tendons a rest. A thumb spica splint holds the wrist and thumb still so the irritated tendons can settle. NHS hand therapy services commonly recommend wearing one for a period of weeks, and taking it off several times a day to move the wrist so it doesn't stiffen up. Ask your GP or a hand therapist about getting the right one rather than guessing — a splint that doesn't include the thumb won't do much for this.
Gentle movement, kept small. Off-splint, move the wrist up and down and side to side, slowly, about 10 times, a few times a day. Then gently bend and straighten the thumb across your palm and back. These should feel like easy movement, not a stretch you're forcing. Stop at the point where it starts to hurt rather than pushing past it.
Then add gentle strength, once it's calmer. Rest your forearm on a table with your thumb pointing up. Lift your thumb up towards the ceiling against very light resistance from your other hand, hold 5 seconds, and lower slowly. 8 to 10 repetitions, once a day. Only start this once the everyday sharp pain has eased, and drop it if it flares things up.
If it isn't settling, a steroid injection into the tendon tunnel is a common next step your doctor may offer. It's worth knowing the research behind it is actually fairly thin — a Cochrane review looking at this found only a small, lower-quality trial, so it isn't a guaranteed fix. That's a conversation to have with a doctor, not a self-help option — but it's worth knowing it exists rather than assuming you just have to put up with it for a year.
Progression note
Judge this over weeks, not days, and use the same next-morning check as any tendon problem: if it's no worse the following day, what you did was fine. As pain settles, spend more of the day out of the splint and gradually go back to normal lifting — but keep the straighter-wrist habit, because that's what stops it coming back. If there's been no meaningful change after about six weeks of doing this properly, that's the point to get it looked at rather than carrying on.
Bottom line
Thumb-side wrist pain after a baby is usually an overuse problem caused by one specific lifting position, repeated hundreds of times. Change the lift, rest the thumb properly for a few weeks, then rebuild gently. Get it checked if it isn't shifting, or if numbness is waking you at night.