I twirl my pencil all the time when I'm bored in class. Will I eventually get carpel tunnel from that habit?
Carpal Tunnel. Results from repetitive action in which wrist is often flexes and extended. Work at a keyboard.
No. Although it won't cause carpal tunnel syndrome, twirling a pencil all the time might exacerbate carpal tunnel syndrome if you already have it.
No. While twirling a pencil around in your fingers over and over might exacerbate carpal tunnel symptoms, it doesn't cause it.