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The Break Is in Your Upper Arm. The Stiffness Usually Turns Up in Your Hand.
A humeral fracture brace is usually fitted 1 to 2 weeks after the break and worn full time, day and night, until X-rays show the bone has healed. That’s commonly 10 to 12 weeks in total, sometimes longer. Tighten the straps daily as swelling drops, keep the skin underneath clean and dry, and move your fingers, wrist and elbow every day.
A humeral fracture brace is a clamshell sleeve around the upper arm that holds a broken shaft of the humerus in line, while the ELBOW AND SHOULDER KEEP MOVING.
A shoulder abduction splint holds the arm out from the body, and is used after burns in the armpit and some shoulder surgery.
Both sit above the hand, but a hand therapist often makes and manages them, because the hand is what suffers if the arm above it stiffens or the nerves are affected.
Here’s the problem. For 10 to 12 weeks, everyone’s eyes are on the X-ray. Meanwhile the hand hangs at the end of a protected arm, swells, and stops being used. By the time the bone is healed, some people have a stiff elbow, a puffy hand and fingers that won’t make a full fist. The fracture healed. The arm still doesn’t work.
(Quick note: I’m a hand and elbow person. Your shoulder program comes from your surgeon or physio, and this article won’t try to replace it.)
How does a humeral fracture brace work?
- Two shells, front and back, strapped around the upper arm.
- Compression does the holding. Squeezing the muscles around the fracture keeps the bone ends aligned, and gravity helps straighten the arm.
- Straps are tightened daily as swelling drops, so the compression stays firm.
- Elbow and shoulder stay free, so they don’t stiffen during the weeks the bone takes to heal.
It looks a bit like half a suit of armor. It’s not Iron Man’s, though. The suit doesn’t do the work. Your own muscles, squeezed inside it, do.
The brace works by squeezing. A loose brace is just a sleeve.
How long do you wear a humeral fracture brace?
Your surgeon’s dates come first. A typical course looks like this:
- Weeks 0 to 2: a temporary splint and sling while swelling settles, then the brace is fitted.
- Weeks 2 to 6: brace full time, day and night. Fingers, wrist and elbow moving daily. Any shoulder movement is exactly what your surgeon or physio has prescribed, nothing extra.
- Weeks 6 to 12: brace continues until X-rays show healing and the arm is no longer tender at the fracture.
- After healing: the brace comes off on your surgeon’s say-so. Shoulder rehab is led by your surgeon or physio. Hand and elbow strength usually come back faster than the shoulder.
Don’t take the brace off early because it feels fine. Bone that’s stopped hurting isn’t the same as bone that’s healed.
How tight should the brace be?
- Firm and snug, but you can still slide a finger under each strap.
- Fingers stay pink and warm, and you can move them fully.
- Re-tighten every day, often more than once in the first two weeks, because as the swelling goes down the brace gets loose.
- Check it hasn’t slipped down toward the elbow. A brace sitting on the elbow crease blocks bending and stops holding the fracture.
How do I look after my skin under the brace?
- Wear a thin cotton sleeve or stockinette under the shells, and change it daily.
- Washing: your team will show you how. Usually that means leaning forward so the arm hangs supported, and only opening the brace if they’ve told you to. Don’t take it off on your own to shower.
- The armpit and the inner elbow are where skin breaks down. Dry them properly. Skip thick creams and powders under the brace, they cake and rub.
- Look at the edges daily. Redness that fades within 30 minutes of loosening is fine. Redness that stays, or a blister, needs the brace edge adjusted.
How do I keep my hand, wrist and elbow moving in a humeral brace?
This is the part a hand therapist cares most about, and the part that gets forgotten.
- Full fist, full straighten. 10 slow reps every hour while you’re awake. See tendon glides for the full set.
- Wrist up and down. 10 reps, 3 to 4 times a day, forearm supported on a table.
- Palm up, palm down. Elbow at your side, turn the forearm slowly. 10 reps, 3 to 4 times a day, once your surgeon is happy with it.
- Elbow bend and straighten within comfort, as your surgeon allows. Most functional braces leave the elbow free for exactly this reason.
- Hand up when resting. On a pillow, level with or above your elbow. A hand that dangles all day swells. See swelling after a hand injury.
Why do my hand and elbow get stiff when the break is in my upper arm?
Cos the whole arm gets treated as broken. People stop using the hand to protect the arm.
This is the window most people miss. In weeks 0 to 6 the hand window is wide OPEN: stiffness and swelling respond quickly to daily movement. By week 12, if the hand has done nothing, the window is CLOSING: fingers and elbow have tightened and need weeks of work to get back. The bone was on a clock. So was the hand.
If your fingers already won’t make a full fist, see stiff hand after a cast or splint.
What is wrist drop after a humerus fracture?
- The radial nerve wraps around the shaft of the humerus, and some fractures bruise or stretch it.
- The sign is a dropped wrist: you can’t lift the wrist or straighten the knuckles, and the back of the thumb may be numb.
- Many of these recover on their own over months, often showing first signs of recovery within 3 to 6 months, sometimes longer. Your surgeon will track it, and may order nerve tests if it isn’t coming back.
- In the meantime, a wrist and knuckle splint keeps the hand usable and stops the joints stiffening while the nerve recovers. See the wrist drop splint.
- Report a new wrist drop immediately, especially if it appears after the fracture has been manipulated or the brace was fitted.
A nerve that recovers into a stiff hand is half a win. Keep the joints supple while you wait.
What is a shoulder abduction splint for?
- Burns in the armpit: scar across the armpit pulls the arm into the side. Holding it out keeps the skin long while it heals. Often worn at night for many months while the scar matures. See burns and scar contracture.
- Some shoulder surgery, such as certain tendon repairs and tendon transfers, where a pillow or wedge holds the arm away from the body.
- How long: exactly as your surgeon or burns team prescribes. Shoulder positioning decisions are theirs.
- What’s mine: the hand and wrist at the end of it. Same rules as the brace. Fingers and wrist moving every hour, hand supported, not hanging off the end of the wedge.
- Straps across the neck and chest shouldn’t dig in, and nothing should press hard into the armpit. New tingling in the hand means a strap or the wedge needs adjusting.
Can I work or drive in a humeral brace?
- Desk work: often from about 2 to 3 weeks, once pain allows and you can manage one-handed. Keep the hand moving at the desk.
- Manual or lifting work: not until the bone has healed and your surgeon clears it, often 12 weeks or more.
- Driving: most people can’t control a car safely with an arm in a humeral brace. Wait until the brace is off and you have the strength to steer in an emergency, and check with your surgeon and your insurer. See driving after a hand injury.
- Sleep: most people sleep propped up on pillows, or in a recliner, for the first few weeks. Lying flat tends to hurt more early on.
What a hand therapist does differently
- Fits and adjusts the brace so it squeezes the right place and doesn’t slide onto the elbow.
- Watches the hand, grip, swelling and the wrist, so a stiff hand or a wrist drop gets caught in week 2, not week 12.
- Makes the wrist drop splint if the radial nerve was hit, and keeps the hand ready for when the nerve comes back.
This is one of dozens of splints a hand therapist makes. See what a hand therapist does for the full list.
Go to the ER now if
- The hand turns cold, pale or blue, or the fingers go numb and stay numb after loosening the straps.
- Severe pain that’s getting worse by the hour and isn’t eased by your pain relief or loosening the brace.
Call your surgeon today if
- You can’t lift your wrist or straighten your fingers, and that’s new.
- New numbness or tingling in the hand.
- The arm changes shape, or you feel or hear something shift at the fracture.
- Skin breaking down, blistering or oozing under the brace.
Get it checked if
- Your fingers won’t make a full fist by week 3, or are getting stiffer week on week.
- Your hand and forearm are still very swollen after the first 2 weeks.
- The brace keeps slipping toward the elbow, however you tighten it.
Squeeze the fracture, move the joints, and watch the wrist. The bone heals in the brace. The hand heals by being used.
Written by Nigel Chua, hand occupational therapist in practice since 2005. Thousands of hands, wrists and elbows assessed and treated. My credentials are here. This article explains; it doesn’t examine. Your surgeon decides how long the brace stays on and what your shoulder does; your hand is yours to keep moving.
Every article on this site is written using the Closing Window Method: name the window your condition runs on, find where you are in it, and act while it’s still open.