I have step daughter aged 15 and i am very concerned for her well being, she keeps cutting her wrists, when things don't go her way and she has very bad tantrums with loads of screaming and swearing and these last for days, and tells me this is normal, but her behaviour is affecting my seven year old. I try to do talking therapy, few times she has told me she is depressed because of bullying on social media, but when i stop her from going online, her behaviour gets even worse. She refuses to do school work, and if she hits the little one, and i try to stop it, she makes up lies against me that i pushed her or punched her. Is their anyway we can get help or does she need medication, any input will be highly appreciated. Thank you in advance