Triggers are part and parcel of Post Traumatic Stress Disorder (PTSD). If you have PTSD, you have triggers of some kind that cause a symptomatic reaction. The positive to triggers is that with time and effort you can remove them or lessen the symptomatic impact to non-distressing levels.
Many years ago, I wrote about stressors vs. triggers due to the confusion that stemmed from the use of these terms. If you are unsure about the difference, you should read that article first, as we directly discuss triggers on the assumption you fully understand what they are and that you understand them in the correct context.
The how to for trigger removal is the easy part. Going through the process of removing triggers is the challenging part...