What Is Cyberbullying? Types, Effects and How to Prevent It Cyberbullying can happen through messages, comments, images or group chats, and it can cause children emotional and psychological harm. If parents understand the warning signs, the effects and how to respond, they can support their child and keep them safer. This article gives you a quick overview of online bullying, how to recognise the signs that your child is being hurt, and a step-by-step plan to protect them without adding to their stress. What is cyberbullying and how is it different from traditional bullying? Defining cyberbullying According to UNICEF and Vietnamese law, cyberbullying is the repeated use of digital devices to threaten, harass, humiliate or defame another person. When it happens between students, it is also a form of school violence. UNICEF notes that it takes place on social media, messaging apps, online games and online learning platforms. Under Vietnamese law, it is recognised as a violation of children’s rights in cyberspace. 5 differences that make cyberbullying more dangerous Many parents think online bullying is “less serious” because there is no physical contact. In fact, cyberbullying causes deeper harm, for 5 reasons: First, the bully is often anonymous. Your child may be attacked by a fake account and not know whether it is a classmate or a stranger. This uncertainty can make children suspicious of everyone around them. Second, it can spread without limit. A doctored photo or an insulting message can reach hundreds of classmates in minutes. A few people might witness bullying in the playground, but bullying online can reach the whole class or the whole year group. Third, it happens 24/7. Children have no “safe zone”, not even at home. Every time they open their phone, there may be a new comment or a new message. Fourth, digital evidence lasts. Content can be saved, reshared and resurface years later. Traditional bullying doesn’t work this way. Fifth, it is harder for adults to spot. A bruise on an arm is easy to notice. A message deleted after reading is not. Criterion Traditional bullying Cyberbullying Identity of the bully Usually known to be a classmate or schoolmate May be anonymous, using fake accounts, hard to trace Reach Limited to those who witness it directly Reaches hundreds of people in minutes through shares and screenshots When it happens Only during lessons and break times 24/7, even when your child is at home or asleep Evidence left behind Physical injuries, witness accounts Digital content that lasts and can resurface years later How easily adults notice Easy to spot through bruises, damaged belongings or mood after school Hard, because messages can be deleted and parents can't see group chats Why today’s students are more vulnerable than previous generations Today’s students live much of their social life on their phones. They have class group chats, they keep up friendships through stories, and their reputation is measured in likes. In this setting, every online conflict touches their real-world standing. Three factors increase the risk compared with previous generations: Earlier exposure to the internet: many children have social media accounts from primary school, while they haven’t yet been fully taught digital safety skills. Pressure to be constantly present: missing a group chat feels like being “left out of the conversation”, so children are reluctant to leave even when they are being hurt. Distance from parents: when parents don’t use the same platforms (TikTok, Discord, BeReal), it is hard for them to notice when something is wrong. That is why recognising cyberbullying can’t be something parents do only when they have time. It needs to be built into how schools and families support children every day. The 4 most common types of cyberbullying today Not every case of cyberbullying is the same. Identifying the type your child is facing helps parents choose the right response: reporting to the platform, working with the school or seeking legal intervention. The four types below are the most common in school settings today. Online harassment: repeated insulting comments and messages This is the easiest form of cyberbullying to recognise, but also the easiest to dismiss. The harasser sends negative messages, comments or reactions repeatedly to cause emotional harm. Common forms among students: Comments mocking their appearance, voice or family background under every post Private messages that are obscene, threatening or sent as constant spam “Haha” reactions or mocking emojis every time the victim posts a story What parents often overlook: your child may think it’s “just teasing”. When the behaviour is repeated 3 or more times, it is no longer a joke. It is harassment. Bullying in class group chats and on social media Online bullying in class group chats is the most common form but the hardest to detect. Unlike one-to-one harassment, it has a “crowd” element: many people join in, or watch in silence. Common situations: Setting up a side group chat to talk about one student behind their back, and keeping them out Removing a student from the main group and then “forgetting” to add them back Tagging a classmate in mocking memes or pressuring them to “follow a trend” the group chooses The harm isn’t only to the victim’s feelings. They also lose their social connections within their own class. This is why many lower secondary students ask to change schools without saying why. Sharing sensitive content and doxxing (exposing personal information) This is the most serious form in legal terms. Doxxing is deliberately posting someone’s personal information online to cause harm, such as their address, phone number, private photos or family details. Two common forms among students: Doctored images: putting the victim’s face onto sensitive images and sharing them Leaked private messages: screenshotting one-to-one messages and posting them on a story, in a group or on a school fan page Parents should be aware that, depending on its severity, consequences and evidence, sharing children’s personal information, sensitive images or defamatory content online may be dealt with under the law. It should not be treated as “child’s play”. Cyberstalking: monitoring, impersonation and threats Cyberstalking is the hardest form to detect because the person doing it usually stays hidden. It includes monitoring the victim’s online activity, creating fake accounts in their name, or sending threatening messages from several different accounts. Signs parents should watch for: Your child suddenly switches all their accounts to “friends only” A stranger knows details of your child’s routine (when school finishes, their extra classes) An account appears using your child’s name or photo to post strange content Unlike the other 3 types, cyberstalking often goes on quietly for months before it comes to light. This is where students’ digital safety skills, and support from both school and family, make all the difference. Type How to recognise it Severity First response Online harassment Insulting messages or comments repeated 3 or more times Moderate Block and report the account, save screenshots Group chat bullying Side groups set up to gossip, deliberate exclusion High Tell the form teacher, work with the school Sharing content and doxxing Doctored images, leaked messages, exposed personal information Very high Save evidence, report to the platform and the police Cyberstalking Impersonating accounts, monitoring daily routines Very high Change passwords, report to the police, work with the school Four types of cyberbullying students may encounter in school life 10 signs your child may be a victim, by age group A common mistake parents make is looking for “general signs” that apply to every child. In reality, a 7-year-old being bullied online behaves very differently from a 16-year-old. Below are 10 signs grouped into 3 age bands matching each stage of development. You can tick them off as you read. If your child shows 3 or more signs in the same group, it is time for a deeper conversation. Signs in primary school children (ages 5–10): changes in mood and sleep At this age, children don’t yet have the words to say “I’m being bullied”. The first signs usually show up in their body and emotions, before their behaviour changes. 3 key signs to watch for: Suddenly being afraid of school, or complaining of stomach aches or headaches on Sunday morning or the night before school Crying easily or getting irritable for no reason after using a tablet or looking at a parent’s phone Trouble sleeping, or nightmares about classmates or characters from online games In the PYP (the IB primary programme), student-centred learning helps teachers notice even small changes in each child. However, parents are still the first line of detection at home. Signs in lower secondary students (ages 11–14): unusual withdrawal from social media This is the highest-risk age for cyberbullying. Children already have social media and class group chats, but their coping skills are still limited. 4 signs to check: Suddenly turning off their phone when a parent comes near, or regularly deleting their chat history Completely abandoning a platform they used a lot (for example, no longer posting on TikTok or disappearing from Instagram) Avoiding mentioning a classmate they used to talk about often Asking to change class or school without giving a clear reason A typical feature of this age group: children often keep quiet because they fear their parents will take their phone away. In their minds, that would cut them off from their friends completely. Signs in upper secondary students (ages 15–18): falling grades and self-harm Upper secondary students face more sophisticated forms of online bullying, in which their personal reputation, academic standing and romantic relationships can all be targeted. The consequences are therefore more serious. 3 serious signs: Grades dropping sharply within one term with no clear academic reason Wearing long sleeves all the time, even in hot weather, which is a sign to check for self-harm Talking about death or hopelessness, or posting stories or captions with despairing content International data shows that cyberbullying is a significant risk to students’ mental health. UNICEF has reported that 1 in 3 young people surveyed across 30 countries said they had been victims of online bullying. WHO/Europe also reported that 15% of adolescents in the 2021/2022 HBSC survey had experienced cyberbullying. When to take your child to see a mental health professional immediately Not every sign calls for a professional. But there are 4 situations parents should not handle on their own: Your child mentions suicide or self-harm, even once There are unexplained physical injuries on their body Your child stops eating or stops communicating with the family for more than a week Your child shows panic or fear every time they hear a phone notification These go beyond digital safety skills. They are mental health issues and need professional help straight away. Vietnam’s National Child Helpline, 111, is available 24/7 and free of charge, and has counsellors who can give parents initial support. The psychological, academic and social effects of cyberbullying The point of understanding the effects is not to alarm parents, but to show why it is important to respond early and in the right way. Without timely support, cyberbullying can affect children’s emotions, learning and friendships. Short-term effects: anxiety, sleep problems and avoiding school In the first 2–4 weeks after being cyberbullied, a child’s body reacts even before they make sense of what is happening. Their nervous system goes into “high alert” every time a phone notification arrives. Common signs at this stage: Anxiety when opening social media, with a racing heart and sweaty hands Difficulty falling asleep, or waking in the night to check their phone Avoiding school on days when they share a class with the person bullying them This is a normal biological response to prolonged stress, not a sign of a “weak personality”. Parents should acknowledge this when talking with their child. Long-term effects: depression, low confidence and effects on personal development When online bullying goes on without intervention, children may be at greater risk of anxiety, low self-esteem, social withdrawal or weaker friendships. The impact varies from child to child. Parents should therefore keep an eye on their child’s emotions, sleep, eating and learning behaviour. Three common long-term effects: Lower self-worth: children come to believe that online criticism is “the truth about them” Loss of trust: difficulty making new friends, and suspicion of the motives behind every relationship Social anxiety: fear of speaking up, giving presentations or being looked at The 2021/2022 HBSC study published by WHO/Europe found that around 1 in 6 students surveyed had experienced cyberbullying. Effects on learning and friendships This is the area parents notice most clearly, but often too late. By the time grades fall or a child stops mentioning their friends, the problem may have been going on for months. Effects on learning: Difficulty concentrating in class because their mind is busy tracking online notifications Fear of putting their hand up, in case they become the next “topic” in the group chat Skipping group work because they don’t dare work with the person bullying them Effects on relationships: Isolating themselves at break time Losing interest in extracurricular activities they used to enjoy Possibly becoming a “new bully” to protect themselves, which creates a cycle of harm Why online harm lasts longer than offline bullying Bullying in the playground ends when students leave school. Bullying online has no such boundary, which is why its harm lasts longer. Three main reasons: Digital evidence can last indefinitely: a doctored photo from Grade 8 could still be reshared at age 22 The mind “replays” the event often: because the content can be viewed again and again It is hard to find psychological closure: victims know the evidence is still out there, even five years later That is why digital safety for students is not just a skill for using the internet. It is also a long-term line of defence for their mental health. How does Vietnamese law protect children online? Vietnamese law includes many provisions that protect children from being insulted, defamed, threatened or having information shared unlawfully online. Parents should save evidence, inform the school and contact the authorities when the situation is serious. Depending on the nature and severity of the violation, cyberbullying may be dealt with in two ways: Administrative penalties: providing or sharing false information, defaming someone, or insulting a person’s honour and dignity on social media may result in a fine under current law, and the offending content may have to be removed. Criminal prosecution: if the behaviour seriously damages a person’s honour or dignity, or meets the elements of a criminal offence, the person responsible may face criminal liability under the Penal Code. The school’s role in protecting students from cyberbullying Families can’t see everything their child does online. Schools therefore need a clear child protection system, rather than simply restricting phone use. When researching schools, parents can look out for the following: Safeguarding policy: The school should have a child protection policy, named people responsible and a clear incident-reporting process. Westlink publishes the ISP child protection framework, so parents can read it in advance. 4 layers of protection: An effective system combines policy, people, curriculum and technology. Policies need to be kept up to date, staff trained to recognise risks, digital citizenship built into the curriculum, and measures in place to protect students on the school’s technology systems. Mental health support: As well as handling incidents, the school should have ways for students to be listened to and supported when needed, such as counselling, private spaces and a referral process to external professionals when a case goes beyond what the school can support internally. Working with families: When cyberbullying happens, the school needs a transparent way of receiving, handling and communicating with parents, protecting the student without adding to their stress. So when visiting a school, parents shouldn’t only ask about the curriculum. They can also ask how the school deals with cyberbullying, who receives reports of incidents and how students are supported. An effective protection system needs policy, people, curriculum and technology A 7-point checklist for assessing online safety at a school When visiting a school, parents shouldn’t just ask “Does the school ban phones?” A digitally safe environment needs a clearer system: who is responsible, how incidents are reported, what students are taught and how parents are involved. Dưới đây là bảng đã được gộp lại hoàn chỉnh từ hai phần trong ảnh để bạn có thể dễ dàng sao chép và dán vào Google Docs hoặc Word: Question to ask Why it matters What to check on the tour Does the school have a clearly named person responsible for safeguarding? Parents need to know who is responsible when there is an incident affecting student safety. The school publishes its Designated Safeguarding Lead or safeguarding team. Are there rules on device and internet use? Cyberbullying often starts on personal devices, group chats or online learning platforms. The school has a Cyber Use Policy or Acceptable Use Policy for students. Is there a clear, easy-to-understand incident-reporting process? Children often don't know who to tell when they are bullied online. Students, parents and teachers all know the official reporting channel. Is there psychological support at school? Cyberbullying isn't just a behaviour issue; it also affects emotions and mental health. The school has a counsellor, a wellbeing team or a process for referring to external professionals. Is digital citizenship taught in the curriculum? Prevention is more effective than dealing with incidents after they happen. Students learn about privacy, digital footprints, empathy and responsibility online. Are teachers trained to recognise risks? Many signs of cyberbullying show up in class before parents notice them at home. Teachers know how to record, report and work with the safeguarding team. Does the school work in partnership with parents? Digital safety can't be left to the school alone, or to the family alone. The school offers orientation sessions, guidance materials or a channel for communication when incidents occur. Parents can use this checklist when visiting schools and ask directly about Westlink’s child protection policy. A safe school doesn’t just say “we care about our students”; it shows parents how its system works in practice. How Westlink builds a safe and happy learning environment A safe learning environment isn’t created with slogans. It is built through verifiable policies, properly trained people and values woven into lessons every day. Below are the 4 pillars Westlink operates on. Parents can compare them with the 7-point checklist in the previous section. Applying the ISP safeguarding framework Westlink is part of the International Schools Partnership (ISP), a network of 121 schools in more than 26 markets with around 118,000 students (as at October 2026) [DYNAMIC — RECHECK]. The value of these numbers isn’t to show off scale, but lies in the fact that: Child protection policies are reviewed and updated across the whole network Lessons learned from a situation at one school are shared as standards across the network The Head of Safeguarding has access to international consultation when facing situations beyond local capacity Parents can read the ISP Group Child Protection and Safeguarding Policy 2024 directly on Westlink’s website. It is a policy applied consistently across the group, not an internal-only document. Westlink applies safeguarding principles in its everyday learning environment Online use policy and student protection procedures On digital safety, parents should look for schools with clear policies on device and internet use. Things to check include: when students may use devices, which online behaviours are prohibited, how cyberbullying incidents are reported and who is responsible for handling them. At Westlink, parents can review the school’s child protection policy in advance and ask during the tour how the school guides students to use digital devices safely. Compassion and integrity Westlink is built on 4 core values: Excellence, Commitment, Integrity and Compassion . The last two form the foundation for preventing online bullying at its root. Compassion: students learn to recognise their classmates’ feelings and support them when they are struggling. This isn’t a theoretical ethics lesson; it is built into weekly group activities. Integrity: students are encouraged to be upstanders rather than bystanders. When they see a classmate being bullied online, they speak up and report it rather than staying silent. Alongside procedures for handling incidents, parents should also look at how the school builds students’ ability to prevent bullying. This philosophy runs through Westlink’s IB pathway, from Early Years to the MYP, with the DP currently at the candidate stage. A community of more than 30 nationalities and an international, inclusive environment Westlink has students of more than 30 nationalities. This diversity isn’t only an academic advantage; it is also a natural protection against bullying based on difference. When classmates from Korea, India, Vietnam, the UK and Japan learn together, “difference” becomes normal rather than a reason to be isolated. This is the international and inclusive spirit Westlink has pursued since it opened. A friendly, close-knit learning environment can’t be created overnight. It has to be built every day, with teachers, students and parents working together. Safeguarding helps parents know who is responsible when online risks arise A safe learning environment doesn’t happen by itself. To prevent cyberbullying, schools need clear policies and support procedures that help students learn to behave responsibly. Parents can book a tour of Westlink to find out how the school builds its protection system and supports students. Before visiting, parents may also want to read the school’s child protection policy and prepare suitable questions.
