You’re so ugly it hurts.

Maybe if you lost some weight, someone would actually like you.

No filter can fix that face.

These are the sorts of comments teenage girls see online daily, via social media, group chats, or anonymous messages. While some may dismiss this as teasing, these comments constitute appearance-related cyberbullying.

Our previous research shows appearance-related cyberbullying is one of the most common and harmful forms of online abuse of young people. It not only hurts feelings – it changes how teens, particularly girls, see themselves.

In a new study, we’ve looked at brain images of teenage girls viewing appearance-related cyberbullying. We’ve found even just being exposed to online body shaming directed at others can activate regions of the brain linked to emotional pain and social threat.

Appearance-related cyberbullying is any online behaviour that targets the way someone looks. This includes comments about their face, clothes or body. It often happens in public forums, such as comment sections or social media posts, where other people can see it, join in or share it.

The most damaging type focuses on someone’s body, such as their weight, shape or size. These messages don’t need to be long or explicit to hurt. Sometimes a single word, hashtag or even emoji is enough.

While appearance-related bullying can affect anyone, previous studies have shown teenage girls are particularly vulnerable.

During adolescence, the brain is still........

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