Your Daughter may need counsling to deal with the issues that are bothering her and she might actually like it after she goes a couple of times. in counsling she can let out all thats bothering her get one on one attention and its private.if it gets worse you might have to consider more extreme help.
she probably know that what she is doing if wrong but doesnt know what to do to stop it.
That was my problem I knew what i was doing and feeling were wrong i knew i needed help but couldnt quite get the haelp i wanted. Dad put me away where i got one to one attention and care to get over and deal with the issues that where causing me to be depressed and self harming. I know that medicatio helped me but it is not a cure or that it works for every one. With me it helped with some of the symptoms enough to help me learn to cope with what was actually bothering me. I still today think about cutting or i even get depressed now and then but i have been off meds for 3 years now and i am dealing with my emotions in a healthy way.
so dont give up there is always hope. My dad use to say hope for the best but prepare for the worst.
I hated thate he said that but i understood what he ment also. let her knoe that you love her and that you may not know what she is going through but you are there for her none the less and remind she is not alone. there are other people going through simaluar situations who have simaluar feelings.
THERE IS STILL HOPE. DONT GIVE UP AND DONT GIVE IN!