As many as one in ten young people carry out trolling attacks, with a third of youngsters the subject of online abuse.
More than a quarter of teenagers aged 14 to 18, say they have been the victim of regular attacks, with the majority of criticism about the victim's appearance.
Research from youth volunteering charity vInspired also found that a third of youngsters have lost confidence from trolling, yet nearly a quarter of teenagers admit to finding it funny.
The charity today launches its campaign Lolz not Trolls to tackle the problem.
More top news
Security is to be enhanced around Windsor Castle during the Changing Of The Guard following the Westminster terror attack.
A cloudy start to the day with top temperatures of 18C (64F).
Immigration levels may need to rise, David Davis has said as he refused to commit to a cap on the number of EU citizens coming to the UK.