What Is Claw Hand? Symptoms, Causes, Diagnosis and Treatment
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer: What is claw hand?
Claw hand is a condition in which the fingers flex inward toward the wrist, freezing the hand in a claw shape and making it hard to open the hand or grasp objects. It usually results from ulnar nerve damage but can have other causes [1]. Treatment includes stretching, splints, physical therapy or surgery, and some people recover fully [1].
Key takeaways
Claw hand curls fingers toward the wrist: the hand gets "stuck" in a claw shape; straightening fingers is hard or impossible [1].
Most cases involve the ulnar nerve: damage to this nerve cuts off the signals that tell your fingers to straighten.
It can be present at birth or develop later: congenital cases are diagnosed at birth; others follow injury or disease [1] [2].
Diagnosis needs an EMG test: electromyography shows how and where the ulnar nerve is damaged [1].
Treatment runs from exercises to surgery: splints, stretching, physical therapy, surgery, or infection medication [1].
Recovery takes months to a year or more: some recover fully; others keep some hand impairment [1].
What the research says
Several dynamic tendon-transfer techniques gave comparable results. In a study of 60 patients who had surgery for claw hand, patients were equally divided into three groups: a modified Stiles-Bunnell procedure, a "lasso" insertion into the A1 pulley, and a new insertion of the transferred flexor digitorum superficialis tendon into the lumbrical muscle. One year after surgery, proximal interphalangeal joint angle, grip strength and Brand's criteria improved comparably in all three groups, and the lumbrical technique needed only a single palm incision, which shortened operative time. The report describes a surgical series rather than a randomized comparison (Singh et al., J Plast Reconstr Aesthet Surg, 2022 [5]).
Hand therapy after surgery is part of recovery. In a case series of 3 patients who had tendon transfer surgery for ulnar claw hand after traumatic nerve injury (two had a flexor digitorum superficialis 4-tail transfer and one a Zancolli lasso procedure), hand therapy began after 4 weeks of immobilization. All three returned to work 12 weeks after surgery, and all showed satisfactory functional improvement at 16 weeks on the Brand criteria, the Patient-Rated Wrist and Hand Evaluation and the Patient-Specific Functional Scale. With only 3 patients, it shows what is possible rather than what is typical (Verma et al., J Hand Surg Glob Online, 2023 [6]).
Claw hand is a sign with many possible causes. A surgical review explains that intrinsic paralysis, the weakness behind clawing, can come from stroke, cerebral palsy, Charcot-Marie-Tooth disease, muscular dystrophy, leprosy, trauma, cervical disease and compressive or metabolic neuropathies. It names 3 main problems caused by weak intrinsic finger muscles: clawing with loss of synchronized finger flexion, inability to spread and bring together the fingers, and weak grip. This is why the underlying cause has to be identified before treatment is chosen (Sapienza and Green, Hand Clin, 2012 [4]).
What Is Claw Hand?
Claw hand causes your fingers to bend in toward your wrist. You might see it referred to as ulnar nerve palsy [1]. It can also make it hard (or impossible) to straighten all your fingers. This stuck flexed-in position is what gives claw hand its name — your hand is frozen in a claw shape.
Clinicians describe the classic deformity as hyperextension of the knuckle (metacarpophalangeal) joints with bent (flexed) finger joints, caused by weakness of the small intrinsic muscles of the hand [3] [4].
Claw hand can be a type of congenital hand difference that you're born with, or it can be caused later in your life by an injury or another health condition [1] [2].
Most cases of claw hand are caused by damage to your ulnar nerve [1], the nerve that controls some of the muscles that flex and extend your fingers.
Who does claw hand affect?
Claw hand can affect anyone. Men are slightly more likely to develop it than women [1].
How does claw hand affect your body?
Claw hand makes it hard to use your hand the way you're used to — especially if you weren't born with it — as it can affect your ability to touch, grasp and move objects. It might also be hard to do your job or schoolwork with a claw hand, especially if you need to hold tools or type on a keyboard.
Claw hand vs. Dupuytren's contracture and trigger finger
Claw hand, Dupuytren's contracture and trigger finger all make it hard to straighten your fingers. The difference is what causes them:
Condition | What causes it |
Claw hand | Usually caused by damage to your ulnar nerve, which controls muscles in your ring and pinkie fingers; the muscles don't get the electrical signals that tell them to straighten. |
Dupuytren's contracture | A genetic disorder that makes the tissue under the skin of your palms and fingers thicken and tighten; nodules grow on the hand's fascia until fingers pull toward your wrist. |
Trigger finger | Swelling in the hand's tendons from overuse and inflammation; fingers can remain locked in a flexed or extended position, sometimes requiring surgery. |
Claw Hand Symptoms
The most obvious symptom of claw hand is your hand being stuck in a claw shape with your fingers flexed in toward your wrist. It might be hard to extend your fingers away from your wrist — you might not be able to move your fingers at all.
You might also have trouble "opening" your hand — spreading your fingers wide away from the center of your palm like you usually can.
If the claw hand is caused by damage to your ulnar nerve, you might feel tingling or numbness along your forearm into your wrist, ring and little fingers [1].
Symptom | What you may notice |
Hand stuck in a claw shape | Fingers flexed in toward the wrist; hard to extend them away from the wrist, or unable to move them at all. |
Trouble opening the hand | Difficulty spreading fingers wide away from the center of the palm. |
Tingling or numbness | Along the forearm into the wrist, ring and little fingers (when caused by ulnar nerve damage). |
Reduced grip strength | Difficulty touching, grasping and moving objects. |
Daily-task challenges | Harder to do job or schoolwork involving tools, typing or fine hand movements. |
What Causes Claw Hand?
Causes of claw hand include:
Cause | How it happens |
Injury to the ulnar nerve | Any injury to your neck, chest or arm can damage the ulnar nerves that run from either side of your neck down through your arms to your wrists [1]. |
Cubital tunnel syndrome | Also called ulnar nerve entrapment — the ulnar nerve gets irritated or compressed (squeezed) on the inside of your elbow [1]. The pressure interferes with its ability to control hand muscles and causes numbness and tingling. People who put repeated pressure on their elbows and wrists, or perform repetitive elbow and wrist-bending movements, are more at risk. |
Congenital hand difference | A variation in the usual formation of the hand that occurs in the womb; people with congenital claw hand have it from birth. |
Cervical spondylosis | Age-related wear and tear in the cervical spine (neck) [1] that can lead to neck pain and stiffness; some people lose hand function. |
Scar tissue | |
Infections (rare) |
How Is Claw Hand Diagnosed?
Your healthcare provider will diagnose claw hand with a physical exam and an electromyography (EMG) test. They'll look at your hand and check its function — how well you can bend and move your fingers compared to your usual ability. If your provider suspects you have claw hand or another nerve issue, you'll need an EMG.
Electromyography testing
An EMG is a diagnostic test that measures how well your muscles and nerves work [1] [3]. Your provider will insert thin needles through your skin into your muscles. When you move your muscles, electrodes on the end of the needles measure their electrical activity. If your ulnar nerve is damaged, an EMG will show how and where [1].
Diagnostic step | What it shows |
Physical exam | How well you can bend and move your fingers compared to your usual ability. |
Electromyography (EMG) | Measures muscle and nerve electrical activity; shows how and where the ulnar nerve is damaged. |
At-birth diagnosis | Congenital claw hand is diagnosed when the baby is born. |
Claw Hand Treatment Options
Your provider can treat claw hand in a few different ways. Which treatment you'll need depends on what's causing it and how severe your symptoms are:
Treatment | What it involves |
Stretching exercises | Exercises for your forearm, wrist and hand. |
Splint or brace | Worn on your affected fingers. |
Physical therapy | To increase your strength and flexibility. |
Surgery | To release your fingers and relieve symptoms [1]. |
Medication | To treat an infection that's causing claw hand [1]. |
Claw hand surgery
You might need surgery to release your fingers and relieve your claw hand symptoms. Claw hand surgeries include nerve repair, tendon release, skin grafts and tendon transfer [1] [2]. Your provider or surgeon will tell you which type of surgery you need and what to expect.
Recovery timeline
How long it takes to feel better depends on which kind of treatment you needed:
If the ulnar nerve is the cause and the nerve is severely damaged, there may be long-term nerve-related symptoms [1].
Living With Claw Hand
Claw hand can be a temporary condition, but it can also be a long-term issue. How long it affects you depends on what causes it and how your fingers and hand respond to treatment. Some people fully recover after wearing a brace and working with a physical therapist. Others have some impaired hand function, even after having claw hand surgery [1]. Talk to your provider or surgeon about how much improvement you should expect based on your unique situation.
If you use your hands for your job or use all your fingers for schoolwork, you might need to miss work or school while recovering. Talk to your provider about what activities you can do with your affected fingers and whether there are any accommodations you might qualify for.
Self-care
If you have a splint or brace, wear it as often as your provider asks you to. Similarly, if you're working with a physical therapist, try to do your stretches and exercises as often as you can. Talk to your provider if your symptoms are getting worse, or if you're experiencing any pain.
When should you see a healthcare provider?
Visit your provider as soon as you notice any changes in your hand or fingers, including pain or stiffness that doesn't get better in a few days.
Go to the emergency room if you've experienced a trauma like a fall or a car accident, or if you can't move or use your hand like you usually can, you lose feeling in your hand or arm, or you think you have a broken bone.
Questions to ask your doctor
Do I have claw hand or another condition?
Which treatments will I need?
Will I need surgery?
How long will I need to wear a brace or go to physical therapy?
Prevention
Many causes of claw hand can't be prevented, especially if you're born with it. You can, however, help prevent damage to your ulnar nerve and cubital tunnel syndrome [1]:
Prevention step | Why it helps |
Avoid leaning on your elbow | Reduces pressure on the ulnar nerve inside the elbow. |
Avoid pressure on the inside of your arm | Prevents nerve compression. |
Don't rest elbows on chair armrests; keep your chair high | Prevents repeated elbow pressure while working. |
Sleep with your elbow straight | Reduces overnight nerve compression. |
Avoid overusing your arms and elbows | Less repetitive strain on the nerve. |
Rest after intense physical activity | Gives your body time to recover. |
Conclusion
Claw hand is one of those conditions that reshapes a familiar part of your body — the hand you use to touch, grasp, type and work — into something that suddenly feels foreign. The culprit is most often the ulnar nerve, whose damaged signals leave the fingers stuck in a flexed, claw-like position. Whether it's present from birth or arrives through injury, nerve compression, spinal wear and tear, burn scars or infection, the path forward is the same: get it checked early with a physical exam and an EMG, and follow the treatment your provider recommends. Stretching, splints, physical therapy and, when needed, surgery can release the fingers and rebuild strength — though recovery asks for patience, often spanning months to a year or more. Protecting your elbows from pressure is the best defense you have, and every bit of progress along the way is worth celebrating.
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Frequently Asked Questions
What is claw hand?
A condition that causes your fingers to bend in toward your wrist, leaving the hand stuck in a claw shape and making it hard to straighten your fingers.
What is the medical name for claw hand?
Ulnar nerve palsy.
What does a claw hand look like?
The fingers flex in toward the wrist in a claw-like position, and the hand may look frozen in that shape.
Can you straighten your fingers with claw hand?
It might be hard or impossible to straighten all your fingers, and in some cases you can't move your fingers at all.
What nerve causes claw hand?
Damage to the ulnar nerve, which controls the muscles in your ring and pinkie fingers.
Why can't you straighten your fingers in claw hand?
The damaged ulnar nerve stops sending the electrical signals that tell the muscles to straighten.
Is claw hand temporary or permanent?
It can be either — a temporary condition or a long-term issue, depending on the cause and how your hand responds to treatment.
Can you be born with claw hand?
Yes. Congenital claw hand is present at birth due to a variation in hand formation in the womb.
When is congenital claw hand diagnosed?
When the baby is born.
Does claw hand affect men or women more?
Anyone can develop it, but men are slightly more likely to develop it than women.
What are the symptoms of claw hand?
A hand stuck in a claw shape, difficulty straightening fingers, trouble opening the hand, and tingling or numbness along the forearm into the wrist, ring and little fingers.
Can claw hand cause numbness?
Yes — tingling or numbness along the forearm into the wrist, ring and little fingers is a symptom when the ulnar nerve is damaged.
Does claw hand affect your grip?
Yes. It affects your ability to touch, grasp and move objects.
Can claw hand affect your job?
Yes — especially tasks involving holding tools or typing on a keyboard.
What is the difference between claw hand and trigger finger?
Claw hand is usually caused by ulnar nerve damage, while trigger finger is caused by swelling in the hand's tendons from overuse.
What is the difference between claw hand and Dupuytren's contracture?
Dupuytren's contracture is a genetic disorder where palm and finger tissue thickens and tightens, pulling fingers toward the wrist — whereas claw hand involves nerve damage.
What causes claw hand?
Ulnar nerve injury, cubital tunnel syndrome, congenital differences, cervical spondylosis, burn scar tissue, and rarely nerve-affecting infections.
Can a neck injury cause claw hand?
Yes. Any injury to your neck, chest or arm can damage the ulnar nerves that run from the neck down to the wrists.
What is cubital tunnel syndrome?
Also called ulnar nerve entrapment — when the ulnar nerve gets irritated or compressed on the inside of the elbow.
Who is at risk for cubital tunnel syndrome?
People who put repeated pressure on their elbows and wrists, or perform repetitive elbow and wrist-bending movements.
Can a car accident cause claw hand?
Yes — trauma to the arm, chest or neck can damage the ulnar nerve.
Can cervical spondylosis cause claw hand?
Yes. Age-related wear and tear in the cervical spine can cause some people to lose hand function.
Can burns cause claw hand?
Yes. Scar tissue from a severe burn can become tight enough to cause claw hand.
Can infections cause claw hand?
Yes, though it's rare — nerve-affecting infections like leprosy can cause it.
How is claw hand diagnosed?
With a physical exam and an electromyography (EMG) test.
What is an EMG test?
A diagnostic test that measures how well muscles and nerves work by recording their electrical activity with thin needles inserted into the muscles.
What does an EMG show for claw hand?
If the ulnar nerve is damaged, the EMG shows how and where it is damaged.
How is claw hand treated?
Stretching exercises, splints or braces, physical therapy, surgery, or medication for underlying infections — depending on cause and severity.
Do you need surgery for claw hand?
You might, to release your fingers and relieve symptoms — your provider or surgeon will determine which type you need.
What types of claw hand surgery are there?
Nerve repair, tendon release, skin grafts and tendon transfer.
How long do you wear a splint for claw hand?
Usually a few months.
How long does physical therapy take for claw hand?
It's a longer-term treatment that can take a year or more.
How long does claw hand surgery recovery take?
At least a few months, plus physical therapy to regain strength.
Can claw hand come back after surgery?
If the ulnar nerve was severely damaged, long-term nerve-related symptoms may persist — talk to your provider about your expected improvement.
Can you fully recover from claw hand?
Some people fully recover after wearing a brace and working with a physical therapist; others retain some impaired hand function even after surgery.
Will claw hand affect my ability to work?
If your job uses your hands, you might need to miss work while recovering — talk to your provider about activities and accommodations.
How do I take care of myself with claw hand?
Wear your splint or brace as often as your provider asks, and do your stretches and exercises as often as you can.
When should I see a provider for claw hand?
As soon as you notice any changes in your hand or fingers, including pain or stiffness that doesn't improve in a few days.
When should you go to the ER for a hand problem?
After trauma like a fall or car accident, or if you can't move your hand normally, lose feeling in your hand or arm, or think you have a broken bone.
Can claw hand be prevented?
Congenital causes can't be prevented, but ulnar nerve damage and cubital tunnel syndrome can be — by protecting your elbows and arms from pressure.
How do you prevent ulnar nerve damage?
Avoid leaning on your elbow, avoid pressure on the inside of your arm, don't rest elbows on chair armrests, sleep with your elbow straight, avoid overuse, and rest after intense activity.
Does sleeping position affect claw hand?
Sleeping with your elbow straight helps prevent ulnar nerve compression.
Can repetitive motion cause claw hand?
Repetitive elbow and wrist-bending movements increase the risk of ulnar nerve problems like cubital tunnel syndrome.
What happens if claw hand is left untreated?
The outcome depends on the cause, which is why you should see a provider as soon as you notice any change in your hand or fingers.
Does claw hand hurt?
The condition itself is about finger position and function, but tingling, numbness, stiffness and pain can accompany it — contact your provider if symptoms worsen or you feel pain.
Which fingers does claw hand affect most?
The ulnar nerve controls the ring and pinkie fingers, so these are typically the most affected.
Is claw hand the same as ulnar claw?
Yes — claw hand is also called ulnar nerve palsy, and an "ulnar claw" is the classic presentation.
Can a baby have claw hand?
Yes — congenital claw hand is a hand difference present at birth.
How common is claw hand?
It can affect anyone; men are slightly more likely to develop the acquired form than women.
Will I need to miss school with claw hand?
If your schoolwork requires using all your fingers, you might — ask your provider about activities and accommodations.
What questions should I ask my doctor about claw hand?
Whether you have claw hand or another condition, which treatments you'll need, whether you'll need surgery, and how long bracing or therapy will take.
Can physical therapy fix claw hand?
It can significantly improve strength and flexibility; some people fully recover with bracing and physical therapy alone.
Does claw hand get worse over time?
It depends on the cause. Contact your provider if your symptoms are getting worse or you have pain.
Can you type with claw hand?
It may be difficult, especially since you might need all your fingers for typing — treatment and accommodations can help.
Should you massage a claw hand?
Follow your provider's and physical therapist's guidance — stretching exercises are the recommended approach.
Related Reading
Genetic Disorders: Understanding Types, Causes, and Diagnosis
Cubital Tunnel Syndrome: Symptoms, Causes, Diagnosis, and Treatment
Burns: Symptoms, Causes, Treatment, and Prevention in One Complete Guide
Bone Fractures: What Happens When a Bone Breaks, and How It Heals
Physical Therapy: Enhancing Mobility, Strength, and Recovery
References
Cleveland Clinic. Claw Hand. Cleveland Clinic. Medically reviewed; last updated July 15, 2022. https://my.clevelandclinic.org/health/diseases/23506-claw-hand
National Library of Medicine. Claw hand. MedlinePlus Medical Encyclopedia. Review date August 27, 2024; updated by Ma CB. https://medlineplus.gov/ency/article/003169.htm
Physiopedia. Claw Hand. Physiopedia. Original editor Kirenga Bamurange Liliane. Accessed October 15, 2026. https://www.physio-pedia.com/Claw_Hand
Sapienza A, Green S. Correction of the claw hand. Hand Clin. 2012;28(1):53-66. PMID: 22117924. https://doi.org/10.1016/j.hcl.2011.09.009
Singh AK, Dixit P, Singh V, Vardhan H. Dynamic correction of ulnar claw hand deformity with a simple insertion into the lumbrical muscle. J Plast Reconstr Aesthet Surg. 2022;75(9):3279-3284. PMID: 35672246. https://doi.org/10.1016/j.bjps.2022.04.054
Verma CV, Bhosale KS, Thatte MR, Sawant AD. Outcomes of tendon transfer surgery for correction of ulnar claw hand: a case series. J Hand Surg Glob Online. 2023;5(1):58-65. PMID: 36704378. https://doi.org/10.1016/j.jhsg.2022.09.004
Medical disclaimer
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions about a medical condition or before making decisions about treatment. Never disregard professional medical advice or delay seeking it because of something you have read here.
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