Bullying takes many forms and can have serious negative effects. A bully purposefully tries to dominate others through physical, verbal, or emotional means. A bystander witnesses bullying but does nothing. Common types of bullying are physical, verbal, relational, and cyber. Bullying can cause low self-esteem, depression, and even suicidal thoughts. Victims should tell an adult and not show the bully they are upset. Bystanders should intervene, get help from others, or report bullying to prevent its harmful impacts.