What can cause nerve on nose to twitch? allergies? anxiety?

Who nose: Pardon the pun, but who nose? I've known several people with this symptom, as well as eye, chin, & finger twitching. Obviously it's a neurological event but w/out serious undercurrents or consequences. Some report that taking potassium helps, but the best thing is to relax & drop the concerns. Focusing on it can aggrivate it. In time it will pass.

Nose: Any or all. Also, electrolyte imbalance has been reported as cause. All in all, it is a symptom that passes.