Behaviors such as the one you describe need to be examined in context. That is, they need to be understood in relation to how well the child is mastering the various spheres of a young child's life: home/family,
schoolPreschooler development
Preschooler test
Preschooler test or procedure preparation
School age child development
School age test or procedure preparation
School-age children development and peer relationships/activities. If the child is doing well in all spheres, the behavior itself needn't be a cause for worry. Yes, it is unusual, and should be monitored, but may not represent anything of a serious nature. On the other hand, it might represent some anxiety or might be a symptom of a condition along the Pervasive Developmental Disorder spectrum. It does not sound like a typical self-soothing behavior. If your son is doing well and, apart from the particular symptom, you do not have any worry about him, I'd wait and see and not do anything particular about it. If, on the other hand, he is not functioning well in any of the several spheres I mentioned above, you would do well to have him evaluated by a mental health professional.
same thing. He has turned his finger twiddling action into his own sort of comic book adventures called "Finger Heroes".
Its "violent" also, and there's always a battle going on.
This has been going on since he's been around 5, he's almost 8 now
and he's still twiddling his fingers, but I can see it is gradually fading.
I have confidence because I have seen a lot of the other idiosyncratic behaviors that he had also eventually fade.
My son had facial twitches and eye-blinking,
that had been quite disturbing to us, but eventually faded.
for years he endlessly made loud annoying noises with his mouth ,now thats almost gone.
Good Luck