Thanks for your kind words op.
to fellow survivors of both csa and mental illness/injury.
My reason for thinking bullying/abuse is in teen girls self harming can sometimes be about making yourself unattractive which is quite common in csa victims/survivors. Loads of us are overweight, don't like wearing make up etc.
Also the reluctance to talk even to counsellors (as with many adult victims of sexual assault we think we have some responsibility for it happening and in some cases abusers will actually say that 'you shouldn't parade around in such skimpy clothes then' etc and especially abusers in a position of authority over and above even other adults are very formidable when you think about disclosing. It took me to my 20's to disclose and I wasn't believed) silence can speak volumes. Also abusers can threaten awful consequences 'you'll end up in a home' 'I'll kill your mum' are not uncommon threats.
There's also the possible 'mean girls' scenario which my dd went through - the girls I thought were her 'best friends' were actually being emotionally abusive. It all came to a head and spilled out when the bullying became physical and dd sustained an injury that was clearly non-accidental. They were controlling who she spoke to, who she sat with, what she wore, her hair style truly bizarre behaviour.
And I know you wanna go all mother tigress roaring at anyone who hurts her but it's not helpful for her. I'd also warn against directly asking if she's been abused. If she hasn't that's another thing to worry about (I'm making mum think all sorts) if she is she might be terrified you're onto her secret and she isn't ready to disclose. There are people specially trained to gently extricate such information.
Priorities too, right now the priority is to keep her safe from harming herself or others. One thing that would possibly happen if she became an inpatient and she has been abused she's sadly highly likely to meet another survivor and that may help her.
Re other pps I like the mental injury thing. I'm thinking of all my friends that have mental illness diagnosis and not one hasn't experienced a trauma (abuse, extreme bullying, assault, sexual assault, loss of a child or other very close person especially unexpectedly, physical injury or illness suddenly changing their life...).
There is a genetic component to most mental illnesses but I believe that's a predisposition to not a guarantee of being a sufferer
In my case I believe
Genetic factor + learned behaviour (I believe certain family members are undiagnosed sufferers) + trauma + head injury + too much 'normal' stress = my mind going 'nope too much can't cope'
When speaking to others even with very different diagnoses the stories are very similar.
Eg 'I didn't think it was that weird my mum and uncle do it'