Nightmares are common for trauma survivors, and sometimes go on for months or years. Victims who develop Posttraumatic Stress Disorder, and/or who have other mental health problems, are more likely experience nightmares.
Nightmares after trauma often involve the same frightening elements of the trauma and about 50% are actual repeats of the trauma. Nightmares after trauma also often involve body movements.
One treatment for nightmares is Imagery Rehearsal Therapy, which involves the person who is having the nightmares, while awake, changing how the nightmare ends so that it no longer distressing, and then rehearsed over and over.