Small skin/muscle movement beneath right eye?

It's unlikely to be a neurological problem. It could be a small muscular spasm that's usually associated with eye strain or sleep deprivation. This might be an indicator that you're either not getting enough sleep or you're spending too much time in front of a screen without taking the recommended regular breaks? If you think this might be a possible explanation, I'd recommend changing your habits for a few days and seeing if it clears up. If it does, you've probably solved it. Hope this helps!