Why factory workers are at risk

Hearing loss from noise develops slowly and painlessly, and once it has happened it is permanent. WHO estimates that over a billion young people are at risk from unsafe listening, and occupational noise remains a leading cause of avoidable hearing loss. HSE guidance requires employers to assess and control noise and vibration, and to provide health surveillance where workers are exposed. Repetitive assembly work concentrates strain on the same hands, wrists and shoulders for whole shifts.

01Noise-induced hearing loss and tinnitus

As a rough rule, if you have to shout to be heard by someone two metres away, the noise is likely to be loud enough to harm your hearing over time. Muffled hearing or ringing after a shift are warning signs. The NHS notes that tinnitus is often linked to hearing loss.

What helps

  • Wear hearing protection whenever you are in a hearing protection zone, for the whole time.
  • Make sure earplugs are inserted properly or ear defenders fit with a good seal.
  • Report noisy machines; maintenance and enclosures often reduce noise.
  • Attend hearing checks (audiometry) offered by your employer.

02Hand-arm vibration

Regular use of grinders, sanders, impact wrenches and similar tools can damage blood vessels, nerves and joints in the hands and arms. HSE describes symptoms such as tingling, numbness, loss of grip strength and fingers going white in the cold.

What helps

  • Use low-vibration tools and keep them maintained and sharp.
  • Limit and record time on high-vibration tools; rotate tasks.
  • Keep hands warm and dry, and do not grip tools harder than necessary.
  • Report early symptoms; they can stop getting worse if exposure is reduced.

03Repetitive strain, machinery and chemicals

Assembly line work with the same movements thousands of times a shift can lead to musculoskeletal disorders. Moving parts can trap or cut, and solvents, dusts and fumes can affect lungs and skin. HSE's COSHH guidance sets out how hazardous substances should be controlled.

What helps

  • Rotate tasks and adjust workstations to your height where possible.
  • Never remove or bypass machine guards; isolate machines before clearing jams.
  • Use extraction and the protective equipment specified for each substance.
  • Wash hands before eating and keep food out of work areas.

Weekly checklist for factory workers

  • Put hearing protection in before entering noisy areas, every shift.
  • Record your time on vibrating tools.
  • Stretch hands, wrists and shoulders at each break.
  • Check that guards and extraction are in place before starting.
  • Keep the volume of music and headphones moderate outside work too.
  • Notice any ringing or muffled hearing after work.

When to see a professional

  • Ringing in the ears, or difficulty following conversations in noise.
  • Tingling, numbness, weakness or white fingers.
  • Persistent pain in hands, wrists, shoulders or back.
  • Cough, wheeze, breathlessness or skin rashes that improve away from work.

Sudden hearing loss in one or both ears needs urgent medical assessment, ideally within a day or two.

Where ONU fits

ONU shows your activity, sleep and recovery trends in one place, which can help you see how shift patterns and overtime affect your rest. ONU does not measure noise or vibration and cannot test hearing; use workplace health surveillance for that.

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Common questions

Can tinnitus from noise go away?

Ringing after a single loud exposure often fades, but repeated exposure can make it permanent. Treat any ringing as a warning to reduce exposure.

Are earplugs or ear defenders better?

Either can work if they suit the noise level, fit well and are worn the whole time. Comfort matters because protection removed for even short periods loses much of its benefit.

What is hand-arm vibration syndrome?

It is a condition caused by regular use of vibrating tools, affecting blood vessels, nerves and joints in the hands and arms. Reducing exposure early can stop it worsening.

Sources and further reading

Educational information drawn from the public-health sources listed on this page. It is not a diagnosis, a treatment plan or a guarantee that you will avoid an illness or injury. ONU does not diagnose, treat or prevent disease. Speak to a qualified professional about anything that concerns you, and follow the rules of your employer, sport or local health service.