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Six Weeks in a Cast. Your Fingers Start Their Own Clock on Day One.
Most broken wrists stay in a cast for about 4 to 6 weeks.
It usually starts with a half-cast or splint in the ER for the first few days to a week, cos the wrist swells and a full cast needs room. The full cast goes on once the swelling drops. Repeat X-rays at 1 to 2 weeks check that nothing has slipped.
The exceptions: a scaphoid fracture (the small bone at the base of the thumb) often needs 8 to 12 weeks, a child’s buckle fracture often gets a removable splint, and after plate surgery many people go into a removable splint within 2 weeks.
The cast protects the bone. It does nothing for the fingers, elbow and shoulder next to it…and those start stiffening in the FIRST week.
Where are you right now?
- In the ER splint, first week: read what’s normal inside a cast, then the red flags at the bottom.
- In a full cast, weeks 1 to 6: go to “Living in the cast.”
- Given a removable splint instead: read “Removable cast or splint.”
- Cast coming off soon: the last section, then the plan from week 6 in broken wrist recovery time.
How long is a cast on for a broken wrist?
- Stable break, pieces in good position: about 4 to 6 weeks in total. That includes most hairline fractures.
- Break pushed back into place in the ER: about 6 weeks, with closer X-ray checks in the first 2 weeks. These are the breaks most likely to slip.
- Scaphoid fracture: often 8 to 12 weeks, sometimes longer, in a cast that includes the thumb. See scaphoid fracture.
- A child’s buckle fracture: often a removable splint for a few weeks. See buckle fractures in children.
- After plate and screws: usually a splint, with gentle wrist movement starting in the first 2 weeks. See wrist plate surgery recovery.
Your doctor sets the cast-off date from the X-ray, not the calendar. Use theirs.
Types of cast for a broken wrist
- Splint or half-cast (a backslab): a hard shell on one side, held on with a bandage. It goes on first cos it leaves room for swelling. A sugar tong splint wraps around the elbow to stop the forearm rotating.
- Plaster cast: molds closely to the wrist, which helps hold a break that was pushed back into place. Heavier, and it softens if it gets wet.
- Fiberglass cast: lighter and stronger, and it comes in colors. The padding underneath still gets soggy unless it’s a waterproof liner.
- Waterproof cast: fiberglass with a liner that drains and dries. Only some clinics offer it, and not every fracture suits it. Ask. Don’t assume yours is one.
- Removable splint: for stable breaks, buckle fractures, after surgery, and for a few weeks after a cast. See circumferential wrist splint.
(Yes, you can pick the color. No, purple doesn’t heal faster. I know, I know.)
Removable cast or splint: can I take it off?
Only when you were told you can. Removable means off for washing, or for the exercises your doctor prescribed…not off cos it’s itchy or you’re going out to dinner.
A crack held still knits. A crack moved every day knits slower, and an unstable one can shift.
What’s normal inside a cast
Usually expected:
- Aching and throbbing for the first few days, easier with the hand raised.
- Puffy fingers in the first week.
- Itch. Lots of it, from around week 2.
- The cast feeling looser around weeks 2 to 3 as the swelling goes down. Tell the clinic: a loose cast may need replacing.
Not normal, call the clinic:
- A burning or rubbing spot in one place. That can be a pressure sore starting.
- A bad smell, or fluid seeping through.
- Numbness, pins and needles, or fingers you can’t move.
- Pain that keeps climbing after the first few days instead of easing.
Living in the cast: weeks 1 to 6
- Days 0 to 3 (OPEN window for swelling): hand above your heart as much as you can, on 1 to 2 pillows at night. Not hanging at waist height in a sling all day.
- Fingers (the CLOSING clock starts here): make a full fist, then straighten fully, 10 times every waking hour. Then touch your thumb to each fingertip.
- Elbow and shoulder: bend and straighten the elbow, then lift the arm overhead with the other hand helping. 10 reps, 3 to 4 times a day.
- Itch: blow the cool setting of a hairdryer into the gap, or tap the cast. Nothing goes down it. No coat hangers, no chopsticks, no MacGyver moves. A scratch under a cast can’t be seen or cleaned, and it can become an infected sore.
- Showers: a plastic bag sealed at the top, or a cast cover, with the arm held out of the water. If the cast gets wet through, call the clinic.
- Daily use: light tasks with the cast hand helping, like holding paper or steadying a cup. No lifting, pushing or leaning on it.
The cast is for the wrist. The fingers are your job.
Fingers that sit still for 6 weeks in a swollen hand come out stiff. Stiff fingers after a wrist fracture can take longer to fix than the fracture itself.
The cast decides whether the bone heals straight. The six weeks inside it decide how stiff everything else comes out.
If it isn’t going to plan
It’s week 3. The pain should be settling, and it isn’t. Or your fingers feel tighter every morning instead of looser.
Climbing pain after the first week can mean the cast is pressing somewhere, swelling is squeezing a nerve, or the fracture has moved. Fingers stiffening in the cast turn into a second problem at week 6, cos the joints have had 6 weeks to set half-bent.
Don’t sit on it until the cast-off appointment. Call the clinic that put the cast on and ask for a check. And if you can’t make a full fist by week 2, ask for a hand therapy referral now, not at week 6. See stiff hand after a cast.
When can I…? (in the cast)
Typical ranges. Your doctor’s plan comes first.
| Activity | In a cast |
|---|---|
| Type and do desk work | Within days, with the cast hand helping. Often back at a desk job in 1 to 2 weeks |
| Drive | Not in a cast. See driving after a hand injury |
| Walk or run for exercise | Usually fine on flat, even ground once the first week’s pain settles. Skip trails and wet surfaces: a second fall lands on the same hand |
| Swim | Not until the cast is off, unless it’s a waterproof cast and your clinic has said yes |
| Gym | Legs, cardio and the other arm straight away. Nothing that loads the cast hand |
When the cast comes off
The wrist will look thin, dry-skinned and puffy, and it’ll barely bend. That’s 6 weeks of stillness. It’s not damage.
Wash it gently, moisturize, don’t scrub the flaky skin. Start moving it the same day. See wrist fracture exercises after the cast.
Go to the ER if
- Your fingers turn white, blue or cold.
- Pain is severe and escalating, and isn’t eased by raising the hand and taking pain medication.
- Your fingers are going numb and you can’t move them.
These can mean the cast is too tight or swelling is squeezing the nerves and blood supply. Don’t wait until morning.
Call your doctor or clinic today if
- New or worsening numbness in the thumb, index and middle fingers. See numb fingers after a wrist fracture or cast.
- A burning or rubbing spot, a bad smell, fluid seeping through, or a fever.
- The cast is cracked, soft, wet through, or loose enough that the wrist moves inside it.
Get it checked if
- You can’t make a full fist by week 2.
- Your shoulder is stiffening and you can’t lift the arm overhead.
- The pain hasn’t eased at all by week 2.
The cast keeps the bone still for 6 weeks. Keeping everything else moving is on you.
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. If anything in the red flags above sounds familiar, call the clinic that put the cast on today.
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.