Characterized by the development of certain trauma-related symptoms following exposure to a traumatic event (see "Diagnostic criteria" below). While most people experience negative, upsetting, and/or anxious reactions following a traumatic event, a diagnosis of PTSD is made when symptoms and negative reactions persist for more than a month and disrupt daily life and functioning. Symptoms are separated into four main groups: re-experiencing, avoidance, negative cognitions and mood, and hyperarousal. The specific symptoms experienced can vary substantially by individuals; for instance, some individuals with PTSD are irritable and have angry outbursts, while others are not. In addition to the symptoms listed below, some individuals with PTSD feel detached from their own mind and body, or from their surroundings (i.e., PTSD dissociative subtype).
People with generalized anxiety disorder (GAD) display excessive anxiety or worry, most days for at least 6 months, about a number of things such as personal health, work, social interactions, and everyday routine life circumstances. The fear and anxiety can cause significant problems in areas of their life, such as social interactions, school, and work.