hi, the past few months i have been having very frequent cold sores . as soon as 1 goes another 1 comes.. just need to no if there is anything in paticular that could be triggering them off... diet , meds, moods, i am taking citalopram , and since taking them i have been having alot of cold sores i am getting very stressed and fed up with it all now and need to no what is causing so many flare ups