Post-traumatic stress disorder (PTSD)
Having flashbacks, reliving a disturbing or traumatic event from the past, such as a violent encounter or serious accident may indicate that you have PTSD. Other symptoms include poor sleep, social withdrawal and bad dreams. If you have PTSD, you will experience hyper-arousal when exposed to situations which trigger the negative symptoms. Avoidance of these triggers is a common feature of PTSD. Avoidance may be helpful in the short-term, but it can also become a pervasive behaviour that can be detrimental to your relationships with others.