As this graphic treatment depicts, without any trigger warning -- being a graduate of the University of Chicago, I avoid them -- I assigned my class the 19th-century Vietnamese novel The Tale of Kiều.

Trigger warnings are widely used in many universities – and increasingly, the wider world. Last year, London’s Globe theatre attached a trigger warning to Shakespeare’s Romeo & Juliet ...

Trigger warnings caution readers about content which may unsettle those with mental health difficulties. ... It usually starts with "trigger warning" in bold.