I pick my skin, but I make my skin look worse?

I'm only 13, and I pick my skin. I use anything, tweezers, my hands, nail clippers, anything. I make my skin look so much worse, I make cuts and holes out of the smallest things. And I mean all over my whole body. My legs, thighs, breasts, chest, back, arms, and especially my face. My skin wouldn't be THAT bad (pretty bad though) if I didn't pick. My mom picks also, but I get yelled at when I do. She tells me to STOP. I try, and succeed for a little bit. Then I go right back! It's like an addiction but I can't stop. It makes me want to cry. I have so many issues with my body, and I feel like I don't help them. Please help, how do I literally make my self stop? Every time I see a mirror, I pick for at least an hour. Help me