I know it's probably not helpful to suggest this, but relaxation techniques seem to help me. I have what I can only describe as BFS. No doctor has officially diagnosed me but they all say it's nothing and/or they're not concerned about it. I've had a negative brain MRI, clean EEG, and normal labs so it doesn't make much sense to keep on poking around for answers to something that has been, for the most part, only a nuisance.
I am comforted by the fact that in the 6 months or so I have been dealing with this, there has been no "progression" at all.
I get spasms (small twitches) in my fingers that seem to originate in muscles in my hands. There are tons of videos of this on YouTube so apparently this affects many people. See for example:
https://www.youtube.com/watch?v=6WvClfl5VQo
They usually happen when I am stressed, in the afternoons, or if I do strenuous exercise. I also get little zaps from time to time but those are much less common. My MRI shows bulging discs in my neck and spinal stenosis. One neuro said that could be the cause and prescribed physical therapy. I thought it helped but it could just be because it relaxed me. The physical therapy included massage.
My balance, coordination, and strength have not been affected at all. Other than the anxiety this can sometimes produce (i.e., "why am I twitching?" "is it ALS?" "is is MS?"), there have been no other ill effects. I hope it stays this way or improves.