Vibration White Finger (Hand-Arm Vibration Syndrome)

How vibration damages the fingers

Repeated vibration injures:

• blood vessels: the muscle layer of small arteries thickens and overreacts to cold, causing vasospasm
• nerves: damage to sensory nerves and receptors, causing numbness and loss of fine touch
• muscles, tendons and joints: possibly contributing to weak grip and pain

The vascular component, vibration white finger, is a form of secondary Raynaud's phenomenon.

Common tools and jobs

• pneumatic drills, jackhammers and breakers
• angle grinders, sanders and polishers
• chainsaws and brush cutters
• impact wrenches and riveting guns
• concrete pokers and compactors
• hammer drills

Risk increases with the vibration level of the tool, the total time of daily exposure, and the number of years of use. Symptoms often appear after months to years of regular exposure.

Symptoms

Vascular (white finger)

• attacks of whitening (blanching) of the fingertips, triggered by cold or wet conditions, often in the morning
• blanching spreading toward the base of the fingers as the condition progresses
• after an attack, fingers may turn red and throb as blood returns
• the thumb is often spared early on

Neurological

• numbness and tingling, at first intermittently
• reduced sense of touch and temperature
• clumsiness and difficulty with fine tasks
• symptoms at night that disturb sleep

Musculoskeletal

• reduced grip strength
• pain in the hands and arms

Hand-arm vibration can also contribute to carpal tunnel syndrome.

Stages

The Stockholm Workshop Scale grades the vascular and sensorineural components separately:

Diagnosis

• detailed work history: tools, hours a day, years of use
• symptom history, ideally with photos of attacks
• examination of the hands, pulses and nerves
• tests to exclude other causes of Raynaud's, such as scleroderma and lupus
• specialist tests: cold provocation with measurement of finger blood flow or temperature, sensory threshold testing (vibration and temperature) and nerve conduction studies

Treatment

There is no cure, so management focuses on preventing progression:

• reduce or stop vibration exposure: the most important step. Early-stage vascular symptoms may improve; advanced and neurological damage usually does not.
• keep the whole body and hands warm and dry, use heated grips where available, and wear warm gloves
• stop smoking, which further narrows blood vessels
• medicines: calcium channel blockers such as nifedipine for frequent, severe attacks
• treat associated carpal tunnel syndrome
• workplace review: occupational health assessment, job adjustment and regular health surveillance

Prevention at work

• choose low-vibration tools and maintain them well
• reduce the time spent using vibrating tools; rotate tasks
• use the right tool for the job so less force and time are needed
• keep warm and dry at work
• employers should assess vibration exposure and provide health surveillance; in many countries, daily exposure limits apply (for example, EU and UK regulations set an exposure action value and limit based on vibration magnitude and time)
• report early symptoms promptly

Anti-vibration gloves have limited effect on most tool vibration but help keep hands warm.

Frequently asked questions

What is vibration white finger?

Vibration white finger is damage to the blood vessels of the fingers from long-term use of vibrating tools. Fingers turn white and numb during attacks, especially in cold or wet conditions. It is part of hand-arm vibration syndrome.

What are the early signs of hand-arm vibration syndrome?

Early signs include tingling and numbness in the fingers during or after work and whitening of the fingertips in the cold. Reporting these early allows exposure to be reduced before permanent damage develops.

Is vibration white finger reversible?

Early vascular symptoms can improve if exposure to vibration is reduced or stopped. Advanced vascular damage and nerve damage are usually permanent. Stopping smoking and keeping warm help prevent further attacks.

Which tools cause vibration white finger?

High-risk tools include jackhammers, pneumatic drills, grinders, chainsaws, sanders, impact wrenches, riveting guns and concrete pokers. Risk depends on how strongly the tool vibrates and how long it is used each day over many years.

How is vibration white finger different from Raynaud's disease?

Both cause fingers to turn white in the cold. Raynaud's disease (primary Raynaud's) has no known cause and usually starts in young adults. Vibration white finger is a secondary form caused by vibration exposure and often comes with numbness and nerve damage.