###Human: How can I change a child's violent behavior? ###Assistant: Hi. I can understand your concern. Every child is different and has a different temperament. If your niece milestones are normal, she can have a proper eye to eye contact while talking, she can make friends, and she will not have restrictive and repetitive behavior. She has a behavior issue. She does not have the behavior whatever I mentioned, and we need to assess her in detail. Prenatal, natal and her childhood history is required. When she shows such tantrums, try to handle her with authority and do not show aggression and plea in front of her. Give rewards for good behavior and appreciate her when she is doing good things. It will help enormously.