<s>[INST] I have a 17 year old sister at home who is very spoilt and keeps shouting at me and her parents most of the time for no reason at all. Also she gets violent and throws things around and the worst part is my parents do nothing about it. What is your opinion?Ishaan- 22 [/INST] HIThanks for using healthcare magicIf she is the only child at home, that case, such kind of behavior may be towards obedient defiant disorder or impulse control disorder. Better to consult a psychiatrist and get her properly evaluated. In case of behavioral issues, she needs counselling from a psychologist. In case, you need further help, you can ask.Thanks </s>