1) Re-experiencing symptoms: flashbacks--reliving the trauma over and over, including physical symptoms like a racing heart or sweating, bad dreams, frightening thoughts. Re-experiencing symptoms may cause problems in a person’s everyday routine. They can start from the person’s own thoughts and feelings. Words, objects, or situations that are reminders of the event can also trigger re-experiencing.2) Avoidance symptoms: staying away from reminders of the experience, feeling emotionally numb, feeling strong guilt, depression, or worry, losing interests in activities that were enjoyable in the past, and having trouble remembering the dangerous event. Things that remind an individual of the traumatic event can trigger avoidance symptoms. These symptoms may cause an individual to change his or her personal routine. For example, after a bad car accident, an individual who usually drives may avoid driving or riding in a car.3) Hyperarousal symptoms: being easily startled, feeling tense or "on edge," having difficulty sleeping, and/or having angry outbursts. Hyperarousal symptoms are usually constant, instead of being triggered by things that remind one of the traumatic event. They can make the individual feel stressed and angry. These symptoms may make it hard to do daily tasks, such as sleeping, eating, or concentrating.