Which disorder is characterized by re-experiencing trauma and hyperarousal?

Post-Traumatic Stress Disorder (PTSD) is specifically characterized by a persistent re-experiencing of traumatic events along with symptoms of hyperarousal. Individuals with PTSD may have intrusive memories, flashbacks, or nightmares related to the traumatic incident, which makes it difficult for them to return to a state of calm. Hyperarousal refers to being in a constant state of alarm, which includes heightened responses to external stimuli, difficulty sleeping, irritability, and an exaggerated startle response. These symptoms directly correlate with the response individuals have after experiencing a traumatic event, differentiating PTSD from other anxiety or adjustment disorders, which do not encompass the same spectrum of re-experiencing trauma or the acute state of hyperarousal.