A hand that will not close has one of three problems.
It’s either:
- Something is blocking the movement,
- something has stopped pulling, or
- something has stopped sending the signal
You can tell them apart at your kitchen table in about a minute.
Use your other hand to bend the fingers. If they close easily when someone else does it, the joints are fine and the problem is the engine. If they refuse even then, the problem is in the joint or the tissue around it.
Stiffness: it won’t close for anyone
The joint itself, or the tissue around it, has shortened.
This is the most common version by a long way, and it is almost always the aftermath of something — a cast, a splint, an operation, a swollen hand that nobody moved.
- Stiff hand after a cast or surgery — the big one
- Swelling, which physically blocks the fist before anything has tightened at all
- Dupuytren’s contracture — but note this stops the hand OPENING, not closing. If your hand won’t lie flat on a table, look here
- Arthritis, where the joint surfaces themselves no longer travel through full range
- Scar that has bonded to the tendon underneath it
Stiffness is time-sensitive. Tissue that has been short for three months is far harder to lengthen than tissue that has been short for three weeks, and after about six months you are into different and less satisfying territory.
Tendon: one finger, one joint, no pull
Passive movement is normal. Active movement is absent. That combination is close to diagnostic.
- Fingertip alone won’t bend after grabbing a shirt or a tackle — jersey finger, with a deadline
- A finger won’t bend after a cut to the palm or finger — flexor tendon injury
- The finger sticks, then snaps closed — trigger finger, which is a catching problem rather than a stiffness one
- A repaired tendon that has stopped working weeks after surgery — see flexor tendon repair. Ring your surgeon, not your therapist
Nerve: the signal isn’t arriving
Usually painless, usually with numbness somewhere, and it follows a nerve’s territory rather than one finger.
Ring and little finger clawing points to the ulnar nerve. A thumb that will not lift out of the palm points to the median nerve. Weakness with no numbness at all is its own pattern — see AIN and PIN palsy and weak grip.
If someone else can close your hand, the joints are innocent. Look at the tendon or the nerve.
Measure it, don’t describe it
Make the best fist you can and measure the gap between each fingertip and the crease at the base of the palm. In millimeters, with a ruler.
That single number is how hand therapists track this, and it moves before anything feels different. Two weeks of exercises that feel useless often show 8mm of change.
Patients who measure keep going. Patients who go by feel give up in week three, which is exactly when it starts working.
What actually restores a fist
- Warm first, then move. Warm tissue lengthens further. See ice or heat
- Frequency over force. Little and often beats one heroic session. Five to ten minutes, six times a day
- Hold at the end. Thirty seconds at the limit does more than fifty quick reps
- Tendon glides, which move each tendon through its full excursion rather than just bending the joints — see hand exercises after injury
- Deal with the swelling first if the hand is puffy. You cannot stretch past fluid
Pain during the stretch that settles within twenty minutes is acceptable. Pain that is still there the next morning means you went too hard.
Get help now if
- One finger stopped working suddenly, with no stiffness elsewhere
- It followed a cut, however small it looked
- You are losing range week on week rather than gaining
- There is numbness or visible muscle wasting
- You are more than six weeks out of a cast and still cannot reach halfway
Stiffness responds to work. A ruptured tendon responds to nothing but surgery, and only for a while.
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.