I have a twitch in my left thumb-it occasionally moves on it own. My doctor has run CBC blood work and hospital has run bloodwork and all results came back fine. I suffer from anxiety and sometimes depression. Why is my thumb still twitching? Is this a sign of MS, Lupus, or Parkinson’s’?

Age:
Male
Medications:
No
General Information: I have a kidney disease (FSG) im not sure if this has anything to do with the twitching. My doctor doesnt seem to worried. I have not gone to see a neurologist yet.