The ArmDoc HandArm Vibration Syndrome Why Does my Thumb Twitch Sometimes? Greater Chesapeake Hand to Shoulder What is Hand Arm Vibration Syndrome (HAVS) and how to prevent it My fingers sometimes shake. Especially if I move one next to the other, like pinky next to index or index next to the middle finger. Is this an essential tremor? : r EssentialTremor Vibration White Finger Harris & Green Hand Arm Vibration Syndrome Causes and Prevention NASP