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The Bone Sets in Weeks. It Doesn’t Wait for You to Decide.
A broken finger is easiest to fix in the first 1 to 2 weeks, while the bone ends can still be moved back into line.
By about 3 weeks the bone has started to set. By about 6 weeks it has usually healed…in whatever position it was left in.
Is it ever truly too late? Rarely. A finger that healed crooked or twisted can still be corrected months or even years later. But the fix changes from a splint or a quick realignment to an operation that re-cuts the bone.
And there’s a second clock most people miss: STIFFNESS. A finger can heal perfectly straight and still never bend properly again, cos the joints were left to set.
Think Han Solo in carbonite. The bone sets in whatever pose you leave it in.
Where are you right now?
- Hurt it in the last few days, not seen anyone yet: do the fist check below today, then get an X-ray this week.
- Two to four weeks in, and the finger looks crooked or crosses its neighbor: you’re in the closing part of the window. Get seen this week, not next month.
- Months later, it healed crooked: read “Is it worth fixing now?”
- It healed straight but won’t bend or straighten fully: read “The second clock.”
The fist check
Make a gentle fist, as far as the pain allows, and look at your fingernails.
All four fingertips should point toward the same spot at the base of your thumb.
If the broken finger crosses over or under its neighbor, the bone has healed or is healing TWISTED. That’s called rotation, and it doesn’t straighten itself out with time.
Rotation is the one that can’t be ignored. A finger that scissors across its neighbor catches on everything for life.
More on this in broken finger recovery time.
The window, week by week
- Days 0 to 7 (OPEN): the easiest time. A doctor can usually ease a crooked bone back into line, then buddy tape or splint it. Check rotation now.
- Weeks 1 to 3 (CLOSING): soft new bone (callus) is forming. Realigning without surgery gets harder every week. Unstable or displaced breaks, and breaks into a joint, often need pins or screws inside this window.
- Weeks 3 to 6 (CLOSING fast): the callus firms up. A simple realignment is rarely possible now. Any correction is a bigger operation.
- After about 6 weeks (SHUT for a simple fix): the bone has healed in its position. The goal changes. Correcting it means a planned operation to cut and re-set the bone, usually once the swelling has settled.
Your doctor’s dates for your break come first. Some joint fractures run on an even tighter clock. See PIP fracture-dislocation.
Is it worth fixing now?
Not every crooked finger needs surgery. It depends on what the bend costs you.
- Twisted (rotated) and crossing when you make a fist: usually worth a hand surgeon’s opinion. It doesn’t adapt, and it keeps catching.
- A small bend you can see but not feel: often fine to leave. Plenty of people live with a slightly angled finger and full function.
- A step in a joint surface: worth checking, cos an uneven joint can wear into arthritis over the years.
- Shorter than before: usually a cosmetic issue unless it affects grip.
The honest test: does it catch, hurt, weaken your grip, or stop you doing your job? If no, a crooked finger can be a scar you carry. If yes, it’s a surgical conversation.
The second clock: stiffness
Here’s what I see far more often than a crooked bone.
The X-ray looks great. The finger doesn’t bend.
The middle knuckle (the PIP joint) is the fussiest joint in the hand. Keep it still for a few weeks in a swollen finger and it starts to set, bent or straight. Stiffness at week 6 is soft and changeable. By month 3 to 6 it’s setting firm, and every degree costs more work than the one before.
Movement doesn’t come back on its own after a broken finger. It comes back cos someone works it, every day, in the right weeks.
See stiff hand after a cast or surgery.
A crooked finger can be fixed late. A stiff finger has to be won early.
Is this normal?
Usually expected:
- The finger stays swollen and thicker at the knuckle for months after the bone has healed.
- Aching in cold weather or after heavy use for the first year.
- A firm bump at the break site. That’s healing bone.
Check with your doctor if the swelling and stiffness are getting WORSE rather than slowly better.
If it isn’t going to plan
It’s week 4. The finger still looks a bit off, and making a fist feels wrong. You were told it would settle.
Some things do settle. Rotation doesn’t. Neither does a joint that’s been stiff for 3 months without anyone working it. Each week of waiting makes the fix bigger: realignment becomes surgery, and gentle exercises become splints and months of therapy.
So do the fist check today, and measure the bend against the other hand. If the finger crosses, or the movement hasn’t improved for 2 to 3 weeks in a row, get it reassessed this week by your doctor or a hand therapist. A static progressive splint can still change stiffness that exercises alone have stopped changing.
Go to the ER today if
- There’s a cut over the broken bone, or you can see bone.
- The finger is pale, blue, cold or numb.
- The finger is badly bent or a joint looks dislocated.
Get it checked this week if
- The finger crosses over its neighbor when you make a fist.
- You can’t straighten the fingertip on its own. See mallet finger.
- You can’t bend the fingertip on its own. See jersey finger.
Get it checked if
- It healed crooked and catches, hurts or weakens your grip.
- Bending or straightening hasn’t improved for 2 to 3 weeks in a row.
- The joint aches months later, especially after a break into the joint.
The bone sets in about 3 weeks. Stiffness sets over about 3 months. Both clocks start the day you break it.
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 your finger crosses its neighbor when you make a fist, get it seen this week.
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.