Repeated "reliving" of the event, which disturbs day-to-day activity.

• Recurrent distressing memories of the event.
• Recurrent dreams of the event.
• Flashback episodes, where the event seems to be recurring.
• Bodily reactions to situations that remind them of the traumatic event
  

Avoidance

• Inability to remember important aspects of the trauma.
• Lack of interest in normal activities.
• Feelings of detachment.
• Sense of having no future.
• Emotional "numbing", or feeling as though they don’t care about anything.
• Reduced expression of moods.
• Staying away from places, people, or objects that remind them of the event.

Arousal

• Irritability or outbursts of anger.
• Sleeping difficulties.
• Difficulty concentrating.
• Exaggerated response to things that startle them.
• Hypervigilance