marbito11 - I have experienced the same thing. Is it BFS? Anxiety? A different benign phenomena? Or something sinister? I could not tell you because I don't know. (But naturally, like you, I do worry about it.)I don't notice it significantly during normal daytime activities, although I do experience jerks subtly at times when sitting still. What I notice most is in bed, and it doesn't happen only when falling asleep. Just laying in bed resting while totally conscious, my thighs, shoulders, ankles, wrists, fingers, or even neck will occasionally jerk/move. Strangely, it seems to wax and wane in a sine wave type of pattern of about a week or two. E.G, it will basically go away for 5-7 days, then reappear for a few days, become really bad for a few days, then decrease again to almost nothing. It's been going on like this for 5-6 months. Sorry I can't provide a definitive insight into the cause of your issue, but be assured that you are not the only one on this board experiencing this!