Grip Weakness

What grip weakness feels like

People describe it as:

• Dropping things, especially cups and phones.
• Difficulty opening jars, turning keys or door handles.
• Struggling to carry shopping bags.
• Weak pinch for buttons, zips or writing.
• Hand fatigue that comes on quickly.

Pain can make a grip feel weak even when the muscles are fine. Doctors try to separate true weakness from pain-limited grip, because the causes differ. For a broader symptom guide to finger and hand weakness, see weakness of the hand.

Normal grip strength

Grip strength is measured with a handheld dynamometer, squeezing as hard as possible three times with each hand. Values peak in the 30s and decline gradually after about 50.

The dominant hand is usually about 10 percent stronger. A difference much larger than that between hands suggests a problem on the weaker side.

Low grip strength in middle and older age is linked in large studies to higher risks of falls, disability, hospital admission and death from any cause. It is not a cause of these problems but a useful marker of overall muscle health.

Causes of grip weakness

Nerve compression and nerve damage

• Carpal tunnel syndrome: squeezing of the median nerve at the wrist. Numbness in the thumb, index and middle fingers, worse at night; weak pinch and thumb wasting later.
• Cubital tunnel syndrome: ulnar nerve compression at the elbow. Numbness in the ring and little fingers, clumsy fine movements, wasting between thumb and index finger.
• Cervical radiculopathy: a pinched nerve in the neck, usually at C7 or C8, with neck pain radiating down the arm.
• Radial nerve injury: "wrist drop", which weakens grip because the wrist cannot be held up.
• Peripheral neuropathy from diabetes, B12 deficiency or alcohol, usually starting in the feet.

Joint and tendon problems

• Osteoarthritis, especially at the base of the thumb, which makes pinching and twisting painful.
• Rheumatoid arthritis, with swollen, stiff knuckles and morning stiffness.
• Tendon problems: de Quervain tenosynovitis, tennis elbow and golfer's elbow (both reduce grip because pain is triggered by squeezing), trigger finger.
• Injuries: wrist fractures, ligament tears and tendon cuts.

Muscle loss and general conditions

• Sarcopenia: age-related loss of muscle mass and strength, made worse by inactivity, low protein intake and illness.
• Deconditioning after hospital stays or long periods of immobility.
• Thyroid disease, low vitamin D and some medicines (long-term steroids, statins in some people).
• Muscle diseases (myopathies) and myositis.

Brain and spinal cord

• Stroke or TIA: sudden weakness of one hand, usually with face or leg involvement.
• Multiple sclerosis and spinal cord compression in the neck (cervical myelopathy), which causes clumsy hands and an unsteady walk.
• ALS (motor neuron disease): painless, progressive weakness with muscle wasting and twitching, often starting in one hand.

How doctors find the cause

A doctor will ask when the weakness started, whether it affects one or both hands, and about numbness, pain, neck symptoms, injuries and general health. The exam checks strength of individual muscles, sensation, reflexes and muscle bulk. Specific tests include:

• Tinel's and Phalen's tests for carpal tunnel.
• Froment's sign for ulnar nerve weakness.
• Dynamometer grip and pinch measurement.
• Nerve conduction studies and EMG to locate nerve damage.
• Blood tests: glucose, B12, thyroid, inflammatory markers, vitamin D, creatine kinase.
• Imaging: X-rays for arthritis, ultrasound for nerve or tendon problems, MRI of the neck when a pinched nerve or spinal cord compression is suspected.

Treatment

Treating the cause

• Splints at night, steroid injections or surgical release for carpal and cubital tunnel syndrome.
• Physical therapy, medicines and sometimes surgery for a pinched neck nerve.
• Joint protection, splints, injections and disease-modifying drugs for arthritis.
• Rehabilitation after stroke.

How to improve grip strength

Progressive strengthening helps in most causes once acute problems are treated. Do these 3 times a week, stopping if they cause sharp pain or numbness:

• Ball or putty squeezes: squeeze a soft ball or therapy putty for 3 to 5 seconds, 10 to 15 times.
• Finger extension with a rubber band: open the fingers against a band to balance the forearm muscles.
• Wrist curls and reverse curls with a light weight.
• Farmer's carries: walk while holding a heavy bag or dumbbell in each hand.
• Dead hangs from a bar, if your shoulders allow.
• Whole-body strength training two days a week, plus enough protein, which helps reverse sarcopenia.

A hand therapist can tailor a program and suggest aids such as jar openers, thick-handled utensils and lever taps.

Frequently asked questions

What causes sudden loss of grip strength?

Sudden grip weakness in one hand, especially with face drooping, speech problems or arm weakness, can be a stroke and is an emergency. Other sudden causes include nerve injury from sleeping on the arm, a neck disc herniation, a tendon or wrist injury, and a fracture.

What does weak grip strength indicate?

In one hand it usually indicates a local problem such as carpal tunnel syndrome, a pinched neck nerve, arthritis or tendon pain. Weak grip in both hands, especially in older adults, often reflects loss of muscle mass and is linked to higher risks of falls, disability and poorer overall health.

What is a normal grip strength?

Healthy adult men under 50 typically grip about 40 to 55 kg (90 to 120 lb) and women about 25 to 35 kg (55 to 75 lb) on a dynamometer. Values decline with age. Experts consider grip below 27 kg in men or 16 kg in women to be low.

Can carpal tunnel cause grip weakness?

Yes. Carpal tunnel syndrome compresses the median nerve, which controls muscles at the base of the thumb. It can cause clumsiness, a weak pinch and dropping objects, usually with numbness in the thumb, index and middle fingers. Visible thumb muscle wasting is a sign to see a doctor soon.

How can I improve my grip strength?

Squeeze a stress ball or therapy putty, do wrist curls, carry heavy bags (farmer's carries) and hang from a bar, two to three times a week. Whole-body strength training and adequate protein also help. If weakness comes with numbness, pain or wasting, get checked before starting.