"Myokymia" -The muscle "fluttering" -feeling that feels just like when pregnant and baby is moving around, kicking and is painless sensation. No, you don't have an alien moving around in your body!- or "quivering" is called "Myokymia- Myokymia is an involuntary, spontaneous, localized quivering of a few muscles, or bundles within a muscle, but which are...