Bullying is a type of youth violence that threatens young people’s well-being. Bullying can result in physical injuries, social and emotional problems, and academic problems. The harmful effects of bullying are frequently felt by friends and families and can hurt the overall health and safety of schools, neighborhoods, and society.
CDC defines bullying as any unwanted aggressive behavior(s) by another youth or group of youths, who are not siblings or current dating partners, involving an observed or perceived power imbalance. These behaviors are repeated multiple times or are highly likely to be repeated. Bullying may inflict harm or distress on the targeted youth including physical, psychological, social, or educational harm.1 A young person can be a perpetrator, a victim, or both (also known as a “bully/victim”).
Bullying can occur in-person and through technology. Electronic aggression, or “cyberbullying,” is bullying that happens through technological devices and mechanisms such as email, instant message, a website, text message, social media, and other digital applications.2
How can bullying be prevented?
CDC works to understand and prevent bullying before it starts. School-based bullying prevention programs are widely implemented but not always evaluated. While emerging research indicates that zero-tolerance policies do not effectively prevent bullying2, it also provides suggestions for school-based program elements that are promising, such as3:
- Multi-tiered systems of support, which includes universal programs or activities for all youth within the community or school; selective interventions for groups of youth at risk for being involved in bullying; and preventive interventions tailored for students already involved in bullying.
- Multicomponent programs that address multiple aspects of bullying behavior and the environments that support it. Examples include examining school rules and using behavior management techniques and social emotional learning in the classroom and throughout the school.
- School-wide prevention activities that include improving the school climate, strengthening supervision of students, and having a school-wide anti-bullying policy.
- Involving families and communities by helping caregivers learn how to talk about bullying and get involved with school-based prevention efforts.
- Developing long-term school-wide approaches that strengthen youth’s social-emotional, communication, and problem-solving skills.
- Focusing on program fidelity by forming an implementation team to make sure the programs are carried out exactly as they were designed.
Latest Articles and Publications
- Understanding Bullying Fact Sheet[PDF 184KB]
- Bullying Surveillance Among Youths: Uniform Definitions for Public Health and Recommended Data Elements, Version 1.0[PDF 8.64MB]
- Measuring Bullying[PDF 21.7MB]
- The Relationship Between Bullying and Suicide: What We Know and What it Means for Schools[PDF 4.78MB]
CDC Youth Violence Prevention Resources
- A Comprehensive Technical Package for the Prevention of Youth Violence and Associated Risk Behaviors[PDF 4.09MB]
- Division of Violence Prevention, Youth Violence Prevention
- Striving to Reduce Youth Violence Everywhere (STRYVE)
- Youth Violence Prevention Centers
- Youth Risk Behavior Surveillance System
- StopBullying.gov – English website
- Espanol.StopBullying.gov – Spanish website
- StopBullying.gov’s Online Bullying Prevention Course(Continuing education available)
- Gladden RM, Vivolo-Kantor AM, Hamburger ME, Lumpkin CD. Bullying Surveillance Among Youths: Uniform Definitions for Public Health and Recommended Data Elements, Version 1.0. Atlanta, GA; National Center for Injury Prevention and Control, Centers for Disease Control and Prevention and U.S. Department of Education; 2013. Available from Bullying Definitions[PDF 8.64MB].
- National Academies of Sciences, Engineering, and Medicine. Preventing Bullying Through Science, Policy, and Practice. Washington, DC: The National Academies Press; 2016. Available from http://sites.nationalacademies.org/DBASSE/BCYF/Science_on_Bullying/index.htm.
- Bradshaw CP. Translating research to practice in bullying prevention. American Psychologist. 2015; 70(4): 322-32.