I guess the title is fairly self explanatory. What prompted this question is that I have a fairly persistent muscle twitch in my right index finger. It seems rather different than what I would normally call “nervous tics” (eye twitches, corner of the mouth, etc).
Basically, periodically my finger tightens up and draws in towards my middle finger. If I try to prevent it from happening, the finger “vibrates.” What are potential causes for this? I’m beginning to get a little worried about it, so it’d be nice to hear “it’s just because of stress” :-).