first off, let’s clarify something
being triggered =/= being uncomfortable
triggers may make you feel uncomfortable, but something making you uncomfortable does not equal to something triggering you.
to put it in simple words, triggers are things/moments/pictures/etc that your brain associates with a traumatic event, and when a person that has a trigger sees it or interacts with it in some way, it leads the brain to believe thst they’re experiencing that traumatic event all over again, causing the person to have either a psychological/physical reaction resulting in either a trauma response (like a flashback), or the relapse into certain behaviours that a person may have (eg. self harm, the use of alcohol/drugs).
an important thing to remember is that triggers are personal, not everyone’s going to have the same triggers and if they do, this does not mean they’re gonna react in the same way.