Traumatic loss involves the loss of loved ones in the context of potentially traumatizing circumstances and is a commonly reported traumatic event. It may give rise to disturbed grief, called prolonged grief disorder (PGD) in ICD-11 and persistent complex bereavement disorder (PCBD) in DMS-5, combined with posttraumatic stress disorder (PTSD) and depression. The recent inclusion of grief disorders in both DSM-5 and ICD-11 have spurred research on grief-related psychopathology. This special issue on traumatic loss includes 10 articles and two letters.

Background: Narrative exposure therapy (NET) is a short-term psychological treatment for post-traumatic stress disorder (PTSD) that has been investigated in various contexts among traumatized refugees and other trauma survivors. Sustained treatment results have been reported, but the methodological quality of the trials needs a more thorough examination.

Objective: To evaluate the effectiveness of NET for survivors of trauma, using a quality assessment, an updated meta-analysis, and a meta-regression analysis.

Aim

To evaluate the feasibility and effect of a 10-session creative arts in psychotherapy group programme on posttraumatic stress symptoms, behavioural problems, and posttraumatic growth, in children who experienced a traumatic event.

Design

A multicentre non-randomized controlled trial with a treatment and a control condition conducted in South Africa (4 sites).

Methods

This consensus paper provides an overview of the state of the art in research on the aetiology and treatment of nightmare disorder and outlines further perspectives on these issues. It presents a definition of nightmares and nightmare disorder followed by epidemiological findings, and then explains existing models of nightmare aetiology in traumatized and non‐traumatized individuals.