Need help for my 15 year ol..

I really feel bad for her because it almost looks like shes not happy with the way she looks and this really does upset me. She'll feel down. She doesn't realize how beautiful she is though. Her problem is picking! I can't get her to stop! she barely has anything on her face. Maybe a single pimple a week, but she turns it into this red dot. Now from picking she has 3 marks that arn't fading that fast. Usually she'll be okay, but these are taking a while. It takes her marks to usually fade within 3 days, but it's been a week. Please help me out. Also i want to provide her with help to improve her skin!

1)What can she eat to help out her skin: she does eat a lot of chocolate and occasionaly she has fries at her school does this contribute?

2)Red marks; i've been researching and icame up with two products

a)acnee free scar fade and erase or

b)neutrogena acne peel.

I've done research on all of them

3)good daily cleanser and spot treatment for her?

I pick my skin, too.

1) Food has nothing to do with it.

2) It doesn't sound like she has bad acne at all. The problem with dermatillomania is ANYTHING gets picked at. I've picked moles off my skin.

Go to this website and go through it with her if you can.. and learn more about it. She really can't help it, so please don't be angry with her.