Excerpt from this article:
…there’s also a relatively new form of online bullying that’s beginning to flourish among teens called ‘digital self-harm.’ Digital self-harm is the act of secretly posting hurtful or bullying comments about yourself online. The reasons why teens engage in such behaviors are complicated but simply stated, digital self-harm gives teens an outlet for all the insecurities and self-loathing emotions they have been keeping in their heads.
In a way, it is a safety valve for teen emotions and insecurities. When teens use an alias to self-bullying on social media, they are using it as a way to reconcile their internal thoughts with the external perceptions of what others think of them. Digital self-harm, a form of non-suicidal self-injury (NSSI), is a way for teens to safely garner attention and receive messages of validation and emotional support from friends (Klonsky, et al., 2014).