Can a flu shot trigger an outbreak? I have ghsv-1 Since March 2019 and I got the flu shot yesterday and I’m feeling the achy pain down there which is semi similar to my first ob. Idk if it’s a coincidence or not but it’s Odd. I also have my period, shaved last week with a trimmer, and had sex (with condoms for the first time since infected). I am aware These are all triggers, but I have been fine with these before and the only different thing in play is the flu shot and sex.