B.B.
HI
depending on how bad it is you could take her to the Dr. to get it checked out. My daughter had it pretty bad starting at about eleven and a half, twelve. I took her to her Dr. and he put her on antibiotics for it and gave her some cream. It cleared up pretty good. Show her how to properly wash her face and apply cream and stuff and try doing this for at least two weeks to help her get into a routine. Hopefully she will continue after that.
In my experiance with the two out of three girls I have they really don't start caring about thier apperience untill they are almost thirteen.
My other daughter has a bad habbit of chewing her cuticals. We bribed her to get her to stop. A trip to the mall and a twenty to thirty dollar outfit. It was worth it to me. But she had to quit for a month.
MAybe you could show your daughter pictures of what her skin will look like later in life if she picks at her achne.
Good luck
B.