Hi, A common cause for these types of jittery movements is a normal stage of babies' development. In fact, most babies do show some sort of jittery movements, particularly when they're excited or want something. But still you can consult your doctor if you find it a cause of concern.
It's best to consult Dr to seel whether medication is suitable. Might need to change or increase dosage if not helping with condition. Take care!
Anonymous