Thumb jitter is a consideration of neuromuscular diseases, which requires nervous system examination, electromyography and electroencephalography to rule out whether there is autonomic nerve disorder.

Suggestion:

And it needs to be ruled out whether it is caused by diseases such as Perkins. If your condition is out of control, you need to go to the neurology department as soon as possible to rule out whether there is any tremor caused by neuromuscular diseases.