TRAUMA AND MORE · ARTICLE 02
Complex trauma
Effects of prolonged adversity.
Trauma is not defined only by what happened, but also by the conditions in which it occurred and the support available afterwards. Repeated or prolonged experiences of threat, neglect, coercion or abuse can affect a person's sense of safety, self-worth and expectations of relationships. These effects may persist long after the original circumstances have ended.
1. What is complex trauma?
The term complex trauma commonly describes repeated or sustained traumatic experiences, particularly when escape is difficult or the person depends on those causing harm. Complex PTSD is a recognised clinical diagnosis in the World Health Organization's ICD-11 classification. It includes core PTSD symptoms alongside persistent difficulties with emotional regulation, negative self-concept and relationships. Not everyone who experiences prolonged adversity develops complex PTSD.
2. Possible effects
People may experience shame, emotional numbness, intense fear, difficulties trusting others, dissociation or a heightened response to conflict. Some move between seeking closeness and fearing dependence; others become very self-reliant because relying on others once felt unsafe. These patterns are understandable adaptations in context, although they may later become distressing or restrictive.
3. Development and context
When adversity occurs in childhood or within a close relationship, it can affect the development of expectations about care, boundaries and protection. Social isolation, discrimination, poverty and continuing exposure to danger can compound distress. Such explanations should not be treated as a fixed account of a person's life: individuals respond differently, and resilience and support also matter.
4. Assessment and treatment
Assessment explores symptoms, functioning, current safety and other possible explanations without reducing the person to their history. Treatment may involve trauma-focused therapy, work on emotional regulation and trust, and support with present-day difficulties. The sequence and pace should be agreed collaboratively. Medication may help with particular symptoms or co-occurring conditions but does not itself process traumatic memories.
5. Rebuilding safety and choice
Recovery can involve learning to recognise internal states, establishing boundaries, discovering relationships that tolerate disagreement and developing a less punishing view of oneself. Trust is not something a person owes to others; it can develop through repeated experiences of reliability and choice. Progress may be gradual and uneven.
When to seek urgent help
If symptoms are severe, worsening rapidly or make it difficult to remain safe, seek urgent professional support. In England, contact NHS 111 and select the mental health option for urgent support. If there is immediate danger, call 999 or go to A&E.
Further reading and sources
NHS – PTSD information and support
World Health Organization – ICD-11