My daughter does it too. I try to get her to hold my finger instead, sometimes I put mittens on her to stop the scratching but she'll still grab and twist.

its to keep their hands busy

My son does that to me also and i don't have any advice all I can say is I know what your going through. Im thinking about purchasing a teething necklace for mom to wear.just giving an idea

I did when I was breast feeding my daughter. I tried holding her arm down that didn't work. until I started holding her hand instead or letting her hold mine. it worked for me