“Imagery exposure is a technique in which you vividly recall a situation you’ve been ruminating about, such as a colleague pointing out an embarrassing error you made. You can also use imagery exposure for a worry thought (something that hasn’t happened yet).
To start, recall all the sights and sounds of the past situation (or feared situation) in as much detail as you can. For example, if you’re recalling a situation that has happened, you might recall turning bright red with embarrassment and the other people looking at you strangely or laughing. You would also recall details like what the room looked like, what the temperature was, whether the sun was streaming in through the window, and so on. Bring the image of the embarrassing or worry situation vividly to mind.
The following is based on the principle that anxiety symptoms will naturally subside if you don’t use escape or avoidance strategies: Deliberately keep the image in mind until your anxiety falls to half of where it started (or less). For example, if vividly recalling the situation triggers 8 out of 10 anxiety initially, hold the image in mind until your anxiety drops to about a level 4. Repeat the imagery exposure exercise at least once a day until you can bring the image to mind without it triggering more than about half of the peak anxiety you experienced the first time you tried imagery exposure.
Exposure techniques like this are some of the most powerful ways to solve problems with intrusive thoughts when an event is still bothering you long after it happened. Only use the technique if you feel like you can handle it. You can use imagery exposure for recent memories or more distant ones.”