Auto-trolling, self- cyberbullying, digital Munchausen or digital self-harm is a form of self-abuse on the Internet. ^{[2] [3]} It is usually done by teenagers posting fake insults on social media, attacking themselves to elicit attention and sympathy. ^[2] A study in 2012 found that about 35 per cent of those who did this felt better. ^{[2] [1]} Studies in 2016 and 2019 found an increase in prevalence in American adolescents rising from 6 to 9 per cent. ^{[3] [4] [5]} In a 2011 study, boys were more likely than girls to admit to digital self-bullying. ^[6] In a 2022 study published by researchers Justin Patchin, Sameer Hinduja, and Ryan Meldrum, ^[7] US youth who engaged in digital self-harm were between five and seven times more likely to have considered suicide and between nine and fifteen times more likely to have attempted suicide.

In the UK, a woman was cautioned in 2009 for trolling herself on Facebook and then jailed for 20 months for repeat offences during 2011–12. ^[8]

Though digital self-harm can be done in various ways, it is usually done in a public or semi-public setting. ^[9] Researchers Rinjani Soengkoeng and Ahmed Moustafa suggest that there are three types of digital self-harm. ^[10] These are:

• social development (either determine if one's friends would defend them or prove one's resilience)
• personal gain (sympathy or entertainment)
• manifestation of negative emotions (which can derive from mental health issues,stressors, or social rejection). ^[10]

These appear to be common reasons for digital self harm according to Sameer Hinduja and Justin W. Patchin's 2017 study of American middle and high school students. ^[11]

Common correlations to digital self-harm include bullying, ^[12] depression, negative emotionality, and sleep deprivation. ^{[13] [14] [15]} There is also research that suggests digital self-harm and physical self-harm have similar causes and motivations. ^[16] The two seem to be positively associated with physical self-harm ^[17] and suicidal thoughts and behaviors. ^[18]

Identifying and preventing digital self-harm is arguably more difficult than its offline counterpart. For one, it is hard for parents to monitor their child's online presence. ^[15] Taking away internet access completely is usually impractical, as the internet is important for gaining important information from the outside world. ^{[19] [9]} There is a need to create strategies for digital self-harm prevention, as it is not the same as physical self harm or suicide. ^[19] Due to anonymous apps such as Yik Yak, Whisper, and Secret, it is more difficult to track digital self-harm without possible invasion of privacy. Research by Dr. Sujita Kumar Kar suggests that "calling out" the behavior of digital-self harm may be counterproductive. ^[13] Instead, encouragement to change online behavior may more beneficial in the long term. ^[13]