Generally these dreams repeat several times over a period of weeks, months, or even years.
As with any reoccurring dream, once you have successfully processed the trauma, you will stop having the dream.
In short, reoccurring dreams show you that there is something important you need to know and act on.
If you do not act on and integrate the dream, your dream will repeat.
The main difference between reoccurring and one-off dreams is that reoccurring dreams have an important message that you are not hearing.
PTSD is common in veterans, rape victims, and people who were abused as children.