What is a nightmare disorder?
According to the 10th revision of the ICD (International Statistical Classification of Diseases and Related Health Problems) – a medical classification list created by the WHO (World Health Organization) – nightmare disorder is characterized by a repeated occurrence of frightening dreams, which lead to awakenings with a detailed reminiscence of the nightmare . Nightmare disorder is a complex problem and an independent risk factor for suicide .
 Jstrm N, Hetta J, Waern M. Persistent nightmares are associated with repeat suicide attempt: a prospective study. Psychiatry Res. 2009; 170(2-3): 208-211.