About 7.7 million people in the United States ages 18 and older have post-traumatic stress disorder (PTSD), a type of anxiety disorder, according to the
Different types of trauma can lead to the onset of PTSD. The
PTSD symptoms fall into three groups: avoidance, re-experiencing and arousal. When a PTSD patient is in avoidance, she can feel emotionally numb, detached or have a sense that she does not have a future. She may stay away from reminders of the trauma, which can include people, objects and places. A PTSD patient can re-experience the trauma through flashbacks and intrusive memories. She may have dreams often about the event. MedlinePlus notes that a PTSD patient can have physical reactions to situations when re-experiencing the trauma. During arousal, the patient may have sleeping and concentrating problems. Hypervigilance may occur, in which she is on guard and more watchful. A PTSD patient can have an exaggerated response when startled. For example, the patient may be more jumpy when she hears a loud noise. The patient may also become irritable.