Spot these Signs of Hand Arm Vibration Syndrome Why Do My Fingers Twitch? Common Causes, Treatments, And When To Seek Medical Help 1 HP 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 Why is My Thumb Twitching? Causes & Treatment The Real Reason Your Finger Is Twitching