While complex trauma and single-event trauma such as a car accident or a medical emergency are both traumas, they are different “doses” of trauma. Single-event traumas happen once. They are self-contained. A person may be in more than one car accident in their life, but they won’t experience dozens or hundreds of car accidents.
Complex trauma involves many repeated similar events, such as being minimized, being physically abused, or being parentified. It involves many repeated similar experiences. While some individual incidents may be traumatic on their own, it is often the repeated and ongoing nature of the experiences that creates complex trauma.
Complex trauma also often occurs within important caregiving relationships, where the people responsible for providing safety, support, and protection are the same people causing harm, whether intentionally or unintentionally.
By definition, complex trauma is different from single-event trauma because it affects more of the survivor’s thinking and way of understanding the world. It can affect beliefs about identity, worth, relationships, and safety because it develops during important developmental periods.
Because complex trauma develops gradually over time, it is often harder to recognize than a single traumatic event, even though its effects can be profound.
This page is part of the What Counts as Trauma? section of the CommuniDID site, which explains how trauma can occur without obvious violence and why survivors often doubt or normalize what happened to them.
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