Common triggers for me include holidays and birthdays. As I understand it, a trigger is something that sets off an underlying mental illness. Certain times of the year the beginning of fall and spring) are also triggers for me. I also try to stay away from certain people who think that my mental illness is my fault or that I could have prevented it somehow (or others who insist I go off of my medication). A big sign for me that I've been "triggered" is severe anxiety, insomnia, and reckless spending.