Vibration white finger is a work-related condition in which regular use of vibrating tools damages blood vessels in the fingers, causing attacks of whitening, numbness and pain, often triggered by cold.
Vibration white finger (VWF) is a condition in which long-term use of vibrating tools damages the small blood vessels in the fingers. Affected workers have attacks in which one or more fingers turn white, become numb and then turn red and painful as blood flow returns. Attacks are usually triggered by cold or wet conditions.
VWF is the vascular part of hand-arm vibration syndrome (HAVS), the broader term for vascular, nerve and musculoskeletal damage caused by vibration exposure. It is a form of secondary Raynaud's phenomenon, meaning the Raynaud's symptoms have an identifiable cause. NIOSH has also described it as Raynaud's phenomenon of occupational origin.
VWF is an occupational disease that develops over months or years. Early symptoms may improve if exposure is reduced or stopped, but in advanced stages the damage is usually permanent and can lead to loss of hand function.
Workers with HAVS may also develop carpal tunnel syndrome. HSE states there is evidence that hand-arm vibration may cause it.
NIOSH identifies the main risk factors as the vibration level of the tool, how long it is used each day, the total years of use and the ergonomics of tool use. Tools commonly linked to VWF include:
The Control of Vibration at Work Regulations 2005 require employers to assess vibration risk, reduce exposure and provide health surveillance where workers are at risk. The daily exposure action value for hand-arm vibration is 2.5 m/s² A(8) and the limit value is 5 m/s² A(8), matching EU Directive 2002/44/EC.
Under RIDDOR 2013, regulation 8, employers must report a doctor's diagnosis of hand-arm vibration syndrome or carpal tunnel syndrome when the worker's job involves regular use of percussive or vibrating tools. See reportable incident.
OSHA has no specific vibration standard. NIOSH published a criteria document on occupational exposure to hand-arm vibration in 1989, which recommends ways to reduce exposure and practices for medical monitoring. Employers also use ACGIH threshold limit values and ISO 5349 to assess exposure. Under OSHA recordkeeping, a diagnosed case that meets the general recording criteria may be a recordable incident.
HSE describes a tiered approach to health surveillance for hand-arm vibration. It starts with a questionnaire for new and existing workers and moves to assessment by a qualified occupational health professional and, where needed, formal diagnosis by a doctor. Severity is often graded using the Stockholm Workshop Scale, which grades vascular and sensorineural symptoms separately. Early detection allows the employer to reduce the worker's exposure before the condition becomes permanent. See medical surveillance.
A forestry worker who had used chainsaws for more than ten years reported that his fingertips turned white and numb on cold mornings. Through the employer's health surveillance program, an occupational health nurse referred him to a doctor, who diagnosed hand-arm vibration syndrome with vascular symptoms.
The employer reported the case as required, reviewed its vibration risk assessment and found that older saws had higher vibration levels than newer models. It replaced the oldest saws, set daily trigger times, provided heated handles and warm gloves, and moved the affected worker to tasks with less vibration exposure. Follow-up surveillance showed no new cases over the next cycle.
No. Primary Raynaud's has no known cause. Vibration white finger is a type of secondary Raynaud's phenomenon caused by exposure to vibration at work.
Early symptoms may improve if exposure is reduced or stopped. In advanced stages, the damage is usually permanent, which is why early detection and prevention are important.
Workers who use hand-held vibrating tools regularly, such as in construction, forestry, quarrying, foundries, shipbuilding, maintenance and road work, are most at risk.
It varies. Symptoms can appear after a few months of heavy exposure or take many years to develop.
The worker should report symptoms promptly. The employer, with medical advice, should review the worker's exposure, which may include reducing or removing the use of vibrating tools to prevent the condition from getting worse.
Part of SafetyIQ's EHS glossary: plain-English definitions of workplace health and safety terms.
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