Something else that hasn't been mentioned yet -teething.
Your kitten is around the age when their adult teeth are starting to come through and will bite and chew a lot as a result.
Fingers, unfortunately, are the perfect combination of solid but not hard that's perfect for chomping on during...
If it is hyperesthesia, one trigger that I found online, and that has really helped me help my twitchy cat, is dry air.
For my girl just making the room a little humid, like putting a wet sock on the heater, makes a big difference. The dry air just bothers her sensitive skin.
Meanwhile, all I...