Trauma Systems Therapy (TST) is a model that addresses the primary reason that care is typically sought for a traumatized child: The child expresses episodes of uncontrolled emotion (e.g. anxiety, sadness, rage, dissociations, flashbacks)  and/or behavior (e.g. aggression, self-destruction, running away, substance abuse) considered problematic by the child or someone else. TST providers are trained to assess these episodes so the conditions controlling their expression can be understood. Updated 2024.