[......nobody]

Hey there! Welcome to TeenHelp. My name is Sparrow, a buddy here on TH

The best advice that I can give you to help her is to encourage her to practice some alternatives to self harm like using a rubber band to slap her wrist or holding an ice cube in the palm of her hand. There are loads of alternatives on our alternatives list here.

The best thing that you can do is to be supportive to her - keep encouraging things that make her feel good and tell her to do more things to make herself happy when she gets the urge.

For my self harm, I personally write down things that I am good at and positive traits about myself on individual parts of paper, cut them out, then put them in a "feel good" jar, this would be a great idea for her to do when she's feeling really down, as she can pull a piece of paper out and make her feel better.

It's so great that you are supporting her and are genuinely concerned about her, you could be one of the keys to getting her to start a better, more positive habit.