I am not sure if it is twitch or a spasm. Lets say I am holding an object, say a glass, there is a sudden jerk in my hand. It is completely involuntary. I used to have it rarely (once in few days) but now I notice it several times a day. When I go to sleep, I sleep sideways with my head resting on my folded elbow, I feel the jerk often. Mostly it is a very subtle internal jerk with no visible movement of the hand but sometimes the hand moves about an inch or two. I also noticed that I get more often when I am stressed.
I had few issues with my cervical and got ACDF done five years ago. Is this something to do with that?