pinching 😩

Brittany • Mommy to a wonderful 6yr old boy, 2yr old girl and 1yr old girl.
How do I get my 9mth old to stop pinching? Not only does she do it while eating, but just sitting on my lap she will pinch. She pinches other people that are holding her too. I have a bunch of tiny bruises on my chest from her pinching. None of my other kids did this. It hurts and I need her to stop.