trigger warning
noun [ C ]
内容预警，情绪触发警告（在正文或视频开始之前的一段警示语，提醒读者或观众内容可能引起强烈的情绪反应，尤其是对于有类似经历的人）
a statement at the beginning of a piece of writing, before the start of a video, etc., warning people that they may find the content very upsetting, especially if they have experienced something similar
Trigger warnings are supposed to protect people from post-traumatic flashbacks. 情绪触发警告是为了保护观众，以避免遭受创伤后往事闪现的情况。