4 Reasons Your Thumb Pain Keeps Coming Back After Having a Baby

By Jessica M.

Last Updated Mar 3.2024

Summary: Thumb pain after having a baby usually isn't weakness or bad luck, it's two tendons swelling inside a narrow tunnel at the base of your thumb, made worse by pregnancy hormones and the repeated motion of lifting your baby.

1. The Splints, Gloves, and Advice You've Already Tried Were Never Built for New Moms

It isn't that nothing works. It's that nothing you tried was made for the way you actually use your hands now.

The rigid splint that locked your whole hand so you couldn't change a diaper. The compression glove that squeezed everything evenly and missed the exact spot that hurts. Ibuprofen every few hours.

Maybe a generic brace off Amazon that dug into your skin or slid around by the second hour.

I'd bought two different braces before this one, both built for sprains or typing or gripping a golf club. Not one of them was built for scooping a baby up under her arms fifty times a day.

2. The Real Problem Is Two Tendons Swelling in a Narrow Tunnel at the Base of Your Thumb

It's not your muscles, and it's not just weakness from being exhausted all the time.

Two tendons run along the thumb side of your wrist, sitting inside a narrow tunnel that's supposed to let them glide freely every time you move your thumb. Those tendons are what let you lift, grip, and pull your thumb away from your hand.

During pregnancy and postpartum, your hormones make that tunnel more prone to swelling if it gets irritated. Then add the actual motion. Every time you tuck your thumb under her to lift her, that tendon gets pulled sideways. Do that dozens of times a day and the tunnel around it swells and tightens.

That's the ache. That's the pain that shoots down into your forearm the second you go to pick her up.

3. The Swelling Is What Keeps Bringing the Pain Back

Once that tunnel starts swelling, it stays tight and irritated even after you rest. So the next time you lift her, it hurts faster and worse than it did the day before.

That's why resting doesn't actually break the cycle. Put your hands down for a day, even two, and the ache fades a little. Pick her back up, and within the hour it's right back. Sometimes worse.

4. Every "Solution" Doctors Offer You Makes Caring for Her Harder, Not Easier

This is the part that made me genuinely angry.

"Just rest it" assumes you have a choice about picking up your own baby.

"Wean earlier than you planned" asks you to change how you feed your child because nobody offered you another option.

"It's just part of motherhood" takes something that's actually a documented, common, treatable condition and tells you to accept it as normal.

So what works?

There's only one way to get real relief: support the tendons that are actually inflamed, not just wait out the swelling.

That's harder than it sounds. The brace has to:

✓ Support the exact spot at the base of the thumb without locking up your whole hand

✓ Leave your fingers free enough to still hold a bottle, snap a onesie, and catch her when she wobbles

✓ Be comfortable enough to actually wear during the day, not just for twenty minutes at a time

So a brace built specifically around this exact motion, developed with input from occupational therapists who work with new parents, was made.

The First Brace Made for the Way a New Mom's Thumb Moves

It's built around how a new mom's thumb actually moves:

A contoured shell supports the base of the thumb, the exact spot the tendon tunnel runs through
All four fingers and your thumb tip stay free, so you keep full grip and dexterity
Adjustable strap so it fits securely without squeezing

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