Eye Movement Desensitization and Reprocessing (EMDR)

If you have gone through some traumatic event (be it a traffic accident, abuse or something seemingly less important, such as having been humiliated), the memory of your experience may come back to your mind, forcing you to revive the original event with the same intensity and feeling, as if it was happening in the present moment.
These experiences that arise in your consciousness can occur either as flashbacks or as nightmares and are due to the fact that the mind was too overwhelmed during the event to process what was happening.

As a result, these unprocessed memories and everything that accompanied them, sounds, thoughts, and feelings, are stored in the brain so that they can be accessed every time we experience something that triggers the memories of the original event.