School bullying is a serious problem for young people in the society and Nigeria at large. It is a threat that no school disregards or dismisses. It can have negative consequences on the general school climate and on the right of students to learn in a safe environment without fear. Bullying can also have negative lifelong consequences both for students who bully and for their victims. This paper defined the concept of bullying, forms of bullying; prevalence of bullying; causes of bullying in both the bullies and bullied; effect of bullying; and the strategy for handling bullying in school children. Increasing public awareness and knowledge about bullying behaviour problem can be a sure way of reducing it.