Why Do My Wrist and Thumb Hurt Since Having a Baby?

Thumb-side wrist pain from lifting your baby? A physiotherapist explains "mommy thumb" (De Quervain's), why it happens and what generally helps.

The baby is getting heavier. Your wrist has started to complain. Picking them up, fastening a bodysuit, or lifting a mug brings a sharp ache along the thumb side — and the same movement happens dozens of times before breakfast.

New-parent wrist pain is easy to dismiss as another thing to put up with. But often there's a recognisable load pattern behind it, and changing that pattern can matter more than finding a stronger stretch.

What is "mommy thumb"?

"Mommy thumb" is an informal name for De Quervain's tenosynovitis. Two tendons that move the thumb pass through a narrow tunnel on the thumb side of the wrist. When that area becomes irritated, gripping, lifting, and twisting can hurt.

Pain may sit near the base of the thumb or travel a little up the forearm, sometimes with swelling or tenderness. The nickname isn't exclusive: dads, other caregivers, and people without children can have it too. And not all thumb-side wrist pain is De Quervain's — a provider needs to assess it to tell.

Why does it happen after having a baby?

The "L-shaped" lift

Think of lifting a baby under the arms: fingers behind the body, thumbs spread wide, wrists bent as you lift. That L-shaped hand position loads the thumb tendons while the wrist supports a growing weight. Repeating it throughout the day can irritate the area even when each individual lift feels small.

The issue isn't being a careless parent. It's a very natural way to pick up a baby, repeated far more often than most hands were used to before birth.

Repetition with little recovery

Feeds, transfers, nappy changes, settling, car seats, and carrying add up. There may be no long stretch when the hands aren't working. Holding a baby's head with the thumb spread during a feed can add sustained load on top of all the lifts.

It's the same daily-load story behind neck and shoulder pain from feeding and some postpartum back pain: a manageable task can become uncomfortable when it's repeated with very little recovery.

Hormones and fluid: part of the story, not all of it

Pregnancy and postpartum fluid changes may contribute to symptoms in some people. Hormonal influences have also been proposed. But the postpartum research points strongly toward the repetitive mechanics of baby care, and the hormonal contribution is less certain than the nickname sometimes suggests.

These studies don't prove a single cause for every person's pain. They do offer a useful practical direction: the way the hands carry the daily load is something that can often be changed.

What generally helps with wrist and thumb pain from lifting a baby?

Relative rest usually means reducing the irritating part of a task, not stopping baby care or keeping the hand completely still. These are general load-management ideas, not an individualized rehabilitation plan. A baby's head and body still need secure, age-appropriate support.

Change the lift

1. Scoop rather than pinch. Many people find it more comfortable to support the bottom with one hand and the head and shoulders with the other, rather than lifting under the arms with thumbs spread.
2. Keep the thumb alongside the fingers where practical. A less spread hand position can reduce the strain of the repeated L-shaped lift without compromising the baby's support.
3. Bring baby close before lifting. Keeping the load near the body lets the forearms and larger arm muscles share the work instead of asking the wrists to hold the weight at a distance.

Change the hold during feeds

4. Support the baby, not just your elbow. A feeding cushion or firm support can help take weight out of the hand. During awake, supervised feeds, the baby's airway should remain clear and their position secure.
5. Let the forearm carry more of the load. Cradling rather than holding the head between a spread thumb and fingers may be more comfortable, depending on the baby's age and feeding needs.
6. Vary the position when feasible. Switching holds or sides gives one set of tissues a break. Feeding support from a qualified provider can help when a comfortable position is difficult to find.

Reduce the extra load

7. Notice the jobs between baby jobs. One-handed phone use, heavy pans, tight jar lids, and carrying a car seat can keep loading the same tender area.
8. Share or adapt the tasks you can. Two hands for a heavier object, another caregiver for some transfers, or setting an item down before reaching can reduce repeated strain.
9. Temporarily scale back painful gripping in exercise. Baby care already counts as load. This article on returning to weights postpartum explains why capacity and symptom response matter more than a calendar date.

Calm it down

10. Use short recovery opportunities. Putting the load down when it's safe and avoiding repeated painful movements can give irritated tissues a chance to settle. Complete immobilization isn't something to prescribe from an article.
11. Discuss a thumb-supporting splint if needed. Some people benefit from a splint that supports both wrist and thumb. A hand therapist, physiotherapist, or doctor can advise on fit and use; a tight or poorly fitting support can create other problems.
12. Get guidance rather than forcing a stretch. Gentle, comfortable movement may be useful, but repeatedly stretching into sharp pain or trying provocative self-tests can aggravate symptoms. A doctor or pharmacist can advise on pain relief compatible with your health and breastfeeding circumstances.

When should you get your wrist or thumb assessed?

A licensed physiotherapist, hand therapist, or doctor in your area can assess pain that isn't improving after a few weeks of changing the daily load, is getting worse, or is making it difficult to hold your baby securely. There is no need to wait until it becomes severe.

Numbness or tingling — especially in the thumb, index, or middle fingers — points toward possible nerve irritation, such as carpal tunnel syndrome, rather than the same tendon problem. Persistent altered sensation or weakness deserves assessment, not simply a different grip.

Assessment can distinguish tendon irritation from joint or nerve problems and guide next steps. Persistent De Quervain's sometimes needs treatment beyond load changes; that decision belongs with a healthcare provider who has assessed you.

What's the bottom line?

Thumb-side wrist pain after a baby is often a daily-load problem, not proof that your hands are weak or that hormones have made it unavoidable. Changing the lift, supporting the hold, and reducing extra gripping helps many people. Improvement varies, and persistent symptoms are worth having assessed.

The Roadmap is a general guide to postpartum movement, not a wrist-treatment program. The goal is a manageable return to daily life — with individualized help where it's needed.

Frequently asked questions

References: Risk Factors Associated With de Quervain Tenosynovitis in Postpartum Women (case–control, Israel), PMC11141414 · Survey study of postpartum de Quervain's (Buffalo, NY), WMJ 2023;122(2):110 · HSE Ireland, Thumb and wrist pain after having a baby.

This article is general education from a physiotherapist's perspective. It is not individualized physiotherapy advice, does not create a therapist-patient relationship, and is not a substitute for care from a licensed healthcare provider in your area. Harleen Kalra is a physiotherapist registered in British Columbia, Canada. For personalized assessment and treatment, please see a licensed pelvic-health provider where you live.