The are several effect that can be cause by bullied is victim becoming perpetrators ,insecure , and mental illness .
1. victim becoming preparators

*"Ketika seseorang di-bully saat anak-anak, maka ia bisa memiliki potensi menjadi korban kembali dan bisa juga berpotensi menjadi pelaku seiring bertambahnya usia," terang Wulan Ayu Ramadhani, M. Psi, psikolog dari Klinik Rumah Hati, dalam perbincangan dengan detikHealth.( "When someone is bullied as a child, then he can have the potential to become a victim again and can also potentially become perpetrators with age," explained Wulan Ayu Ramadhani, M. Psi, a psychologist from Rumah Hati Clinic, in a conversation with detikHealth ) 
*Wakil Sekretaris Jenderal PSI Danik Eka Rahmaningtiyas mengakui sulitnya memutus mata rantai kasus bully anak menjadi permasalahan. Sebab, korban bisa menjadi pelaku dan pelaku dapat pula menjadi korban. ( PSI Deputy Secretary General Danik Eka Rahmaningtiyas said the difficulty in breaking the chain of child bullying cases was a problem. Because, victims can be perpetrators and perpetrators can also be victims)
* Menurut Kementriaan Pemberdayaan Perempuan dan Perlindungan Anak ( Kemen PPPA ) , yaitu sebagai berikut , 84% siswa pernah mengalami kekerasan disekolah ( 8 dari 10 siswa  laki-laki menyebutkan bahwa guru atau petugas sekolah merupakan pelaku kekerasan; 40% siswa usia 13-15 tahun melaporkan pernah mengalami kekerasan fisik oleh teman sebaya; 75% siswa mengakui pernah melakukan kekerasan di sekolah; 22% siswa perempuan menyebutkan bahwa guru atau petugas sekolah merupakanpelaku kekerasan; dan 50% anak melaporkan mengalami perundungan (bullying) di sekolah. ( According to the Ministry of Women's Empowerment and Child Protection (Kemen PPPA), as follows, 84% of students have experienced school violence (8 out of 10 male students said that teachers or school officials were perpetrators of violence; 40% of students aged 13-15 years reported have experienced physical violence by peers, 75% of students admitted having committed violence at school, 22% of female students said that teachers or school officials were perpetrators of violence, and 50% of children reported experiencing harassment (bullying) at school.)
2. Insecure
*According to the Centers for Disease Control and Prevention, harassment can have an impact on a person's physical and emotional health, and also make people insecure both short and long term.
*Based on a study conducted by Eunice Kennedy Shriver of the National Institute of Child Health and Human Development in the United States, anyone involved in bullying, be it victims or perpetrators, is at high risk of experiencing depression and insecurity.
*According to the Centers for Disease Control and Prevention, victims of bullying can also experience physical injuries, social problems, emotional problems and even increase the risk of suicide and death. Therefore, victims of bullying become insecurity and have an increased risk of mental disorders.
3. Mental Illness
* Mayo clinic in the United States also stated the same thing, that victims of abuse can be at high risk for experiencing mental health disorders. Victims of bullying are prone to depression, anxiety disorders, sleep disorders, decreased self-confidence, tendency to self-harm and suicide attempts.
* Executive Director of the National Alliance on Mental Illness (NAMI), Mary Giliberti, stated, there are 1 in 5 teenagers suffering from mental illness as described from name.org, but only less than half decided to seek help. Though Mental Illness is a mental disorder that is quite dangerous and can cause suicide.
* Researchers from Harvard Medical School found that half of mental illness cases began at a very young age, 14 years and three quarters of them occurred since the age of 24 years .