If she threaten's you or physically touch's you in a harmful way.Or even if your scared or feel threatened.Don't let her bully you make her feel stupid and say why are you such a bully to me I am your child.
If she is not threatening you or abusing you in a why to produce physical evidence, then the police cannot do anything to stop her. Your best bet is to seek help from family in mediating to find out why she's doing is and how to stop/control it. You can also call a teen hotline. They can help in the moment and help you find maybe family counseling or another helpful option.
I agree with @NAFTA, it's very difficult to get much legal help if she isn't physically bashing you. The best thing you can do is try to accept the fact that she has a loose screw, and isn't a terribly effective parent- and then it's easier to block out her abuse and realize the problem lies within her, moreso than you. Talking about the situation with an anonymous councillor (eg. over the phone) is also a great way, because they often times have had conversations with people in a similar position as you before, or may have experienced it themselves. Don't feel shame, it's more often than not your fault, like I said. Maybe your mum isn't satisfied with the way her life is turning out so far? Or she was raised by an abusive parent and doesn't seem to be able to grasp an effective way of going about things? Maybe he has relationship troubles, or is otherwise emotionally drained and finds it a huge effort to be tactful with you?
If you're school age, please speak to your counselor or a trusted adult. Even if you can't report it, you need help! It would be great if your mother would get counseling, but you can definitely get some support for yourself.
There are two sides to situations like this barbydolll why is calling the PO lice a option here? Some counciling Might be in order here so you and your mother can have the relationship befitting of any mother and daughter.