No one wants the words “post-traumatic stress disorder” and “children” to appear in the same sentence. But recent events like the Sandy Hook elementary school shooting are reminders that children as well as adults can be exposed to events that cause this debilitating but highly treatable mental illness.Previous posts in this series explained why I advocate for children with post-traumatic stress disorder (PTSD), explored 5 myths and misconceptions about PTSD in children, and defined both trauma and PTSD from a child’s point of view. This post explores some of the causes of PTSD in kids.