Hand Arm Vibration Syndrome (HAVS) PDF) Evaluation of hand arm vibration exposure during intermittent use of powered hand tools by mechanical trade workers Assessment of two alternative standardised tests for the vascular component of the handarm vibration syndrome (HAVS) Occupational & Environmental Medicine What is vibration white finger or hand arm vibration syndrome (HAVS)? A. A mild skin rash that will go away B. A serious skin condition that will not clear up C. Severe frostbite