Those do get less frequent over time, at least. Remembering that helps.
If you realize you're in the middle of one, you gotta remind yourself that it is a flashback, and that whatever happened, you already got through it. Deep breaths are better than shallow ones, they'll help you calm down. And don't close your eyes or try to block it out. Instead, try to focus on what's really around you, like how many different colors you can count in the room or how something really cold feels in your hand. I like to make coffee, the smell brings me back to here instead of there.
no subject
If you realize you're in the middle of one, you gotta remind yourself that it is a flashback, and that whatever happened, you already got through it. Deep breaths are better than shallow ones, they'll help you calm down. And don't close your eyes or try to block it out. Instead, try to focus on what's really around you, like how many different colors you can count in the room or how something really cold feels in your hand. I like to make coffee, the smell brings me back to here instead of there.