Hand-Arm Vibration

Using vibrating tools for long periods can damage the blood vessels, nerves, muscles and joints in your hands and arms. The condition, called hand-arm vibration syndrome (HAVS), builds up slowly over months or years and can become permanent. Early on it feels like a nuisance. Later it can cost you your grip, your sense of touch and your career. The good news is that it can be prevented, and that catching it early matters.

• Construction
• General Industry

What HAVS does to the body

• Blood vessels (vascular effects): Vibration makes the small blood vessels in the fingers narrow and spasm. Fingers turn white during an attack, then blue and red as blood returns. This is often called vibration white finger or Raynaud’s phenomenon, and cold or wet weather triggers it.
• Nerves (sensorineural effects): Tingling, numbness and loss of feeling in the fingers. People drop things, can’t do buttons or fine work, and may not feel heat, cold or cuts.
• Muscles, joints and bones: Weak grip, pain, and sometimes joint damage in the hands, wrists and elbows. Vibration is also linked to carpal tunnel syndrome. See Musculoskeletal Disorders.
• Symptoms often start in the fingertips and spread. In later stages they may affect the whole finger, and the damage may not go away, even if you stop using the tools.

High-vibration tools

The same tool can vary a lot by model, condition, bit and the material you’re working. A dull bit or a worn tool vibrates more. Check the vibration value in the tool’s manual. See Demolition Hammers, Rotary Hammers and Angle Grinders.

Warning signs

• Tingling or numbness in the fingers, especially after work or at night
• Fingers turning white (blanching), then blue and red, especially in the cold
• Loss of grip strength and dexterity: dropping tools, trouble with small objects
• Pain, stiffness or aching in the hands, wrists or arms
• Reduced sense of touch, temperature or pain in the fingers

How exposure is measured

• Vibration is measured as acceleration in meters per second squared (m/s²). A higher number means more vibration.
• Harm depends on how strong the vibration is and how long you’re exposed. What matters is the time the tool is actually running in your hands, called the trigger time, not the whole shift.
• Exposure is usually expressed as an 8-hour equivalent, written A(8).

OSHA has no specific vibration standard, so employers rely on the General Duty Clause and on guidance. Many employers follow limits from other sources, such as the European Union and the UK, where an exposure action value of 2.5 m/s² A(8) and a limit of 5 m/s² A(8) apply, and consensus standards such as ISO 5349 and ANSI S2.70. Check what your employer uses. As an example from these systems, a tool that vibrates at 5 m/s² reaches the action value after about 2 hours of trigger time, and a tool at 10 m/s² reaches it in about 30 minutes. A tool at 10 m/s² reaches the limit after about 2 hours. Real values vary, so use your tool’s data.

Reduce your exposure

Use the hierarchy of controls, starting with the best fixes. See Hierarchy of Controls.

• Eliminate or avoid the vibration: use a different method, such as a saw instead of a breaker, a vacuum, a machine or a remote tool for the heaviest tasks, or cut or core to reduce demolition.
• Choose low-vibration tools and tools with anti-vibration handles, isolators or counterbalance. Compare the vibration values in the manuals before you buy or rent.
• Keep tools in good shape. Maintain them and keep bits and blades sharp. Dull bits vibrate more and work slower. Replace worn parts, such as damaged handles and isolators.
• Use the right tool for the job and the right accessories. Heavier tools than needed, or a tool that isn’t designed for the material, add vibration.
• Let the tool do the work. Use the lightest grip that keeps control, don’t force it, and keep your wrists straight. A tight grip transfers more vibration into your hands.
• Limit time on vibrating tools. Rotate tasks, share the work and take breaks. Short, regular breaks help the blood vessels recover.
• Use supports, such as tool balancers, stands and holders, so you don’t have to hold the weight.
• Keep your hands warm and dry. Wear gloves and warm layers in cold weather. Cold makes attacks more likely. See Cold Stress.
• Don’t smoke or use nicotine. It reduces blood flow in the fingers.

Anti-vibration gloves can help with some tools and frequencies, if they meet ISO 10819, but they don’t protect against all vibration, and thick gloves can make you grip harder. Don’t rely on them in place of other controls.

Example: planning a day with a breaker

Suppose a crew needs to break out a slab with a hand-held breaker that vibrates at about 10 m/s², and the employer works to the 2.5 m/s² action value described above. That tool reaches the action value after only about 30 minutes of trigger time, and the 5 m/s² limit after about 2 hours. A single worker running it all day would go far over both.

• Split the work. Two or three workers each take a share of the trigger time, so no one person gets a full dose.
• Use a better tool or method. A lower-vibration breaker, a floor saw to cut the slab into pieces, or a machine-mounted hammer can cut the exposure dramatically.
• Mix the tasks. Alternate breaking with loading, cleanup and layout, so the hands get rest.
• Track it. Note the trigger time for each person and tool. A simple tally on a clipboard works.

Myths that cause harm

• “My hands are tough.” Damage happens inside the fingers, where you can’t see it, and calluses don’t protect nerves or blood vessels.
• “Thick gloves fix it.” Ordinary work gloves don’t block vibration. Thick gloves can make you grip harder, which can make it worse.
• “It only matters for jackhammers.” Grinders, impact wrenches and many everyday tools add up over a career, especially when used for hours.
• “I’ll just push through the tingling.” Tingling and numbness are early warnings. Pushing through can turn a reversible problem into a permanent one.

Health checks and reporting

• Employers with workers who use vibrating tools regularly should consider health surveillance: a baseline check, regular questionnaires and exams, and referral to a doctor if symptoms appear.
• Tell your supervisor and see a doctor if you notice symptoms. Mention your tool use. Ask whether it’s a work injury. In many places HAVS can be a covered condition. See Filing a Workers’ Comp Claim.
• If symptoms start, the usual advice is to cut exposure, protect your hands from cold, and see a doctor, who may refer you to a specialist.
• During an attack, warm your hands (not with very hot water), and move your fingers. Don’t rub them hard.

Employer responsibilities

• Identify vibrating tools and tasks, and estimate exposure using manufacturer data and trigger times.
• Buy and rent lower-vibration tools, and plan work to limit exposure.
• Train workers on the risks, symptoms and good technique, and encourage early reporting without punishment. See Whistleblower Protection.
• Maintain tools, and keep records of exposure, training and any reported symptoms. See Employer Responsibilities.

Daily vibration checklist

• I chose the lowest-vibration tool that can do the job
• The tool and bit are sharp and in good condition
• I use a light grip and keep my wrists straight
• I limit trigger time, rotate tasks and take breaks
• My hands are warm and dry
• I know the early symptoms and will report them

Last updated: October 4, 2026