There is only one treatment that works as a cure for any type of anxiety, which triggers are a symptom of. It is to look at what triggers you, and face it. There is more than one way to do that, but anything that works will involve facing it. Anything else might make it easier to manage the symptoms, but it won't be a cure.

The key with triggers is to understand why it is a trigger. You are associating it with something in the past. What is it about the trigger that makes you feel like you did in past situation(s)? Then you have to separate out what is happening right now from what happened back then, and be aware of the difference. Often, this will be something to work on with support in therapy, not necessarily on your own. It is uncomfortable and scary, but you will be safe if you take it at a pace that is right for you. It isn't necessary to do it all at once, and if one way doesn't seem to work for you it just might not be the right method for you or the right time. But, yes, triggers can be defused.