Memories of the traumatic event can come back at any time. You may feel the same fear and horror you did when the event took place. For example:

1. You may have nightmares.
2. You may feel like you are going through the event again. This is called a flashback.
3. You may see, hear, or smell something that causes you to relive the event. This is called a trigger. News reports, seeing an accident, or hearing a car backfire are examples of triggers.

You may try to avoid situations or people that trigger memories of the traumatic event. You may even avoid talking or thinking about the event. For example:

1. You may avoid crowds, because they feel dangerous.
2. You may avoid driving if you were in a car accident or if your military convoy was bombed.
3. If you were in an earthquake, you may avoid watching movies about earthquakes.
4. You may keep very busy or avoid seeking help because it keeps you from having to think or talk about the event.

The way you think about yourself and others might change because of the trauma. This symptom has many aspects, including:

1. You may not have positive or loving feelings toward other people and you may stay away from relationships.
2. You may forget about parts of the traumatic event or not be able to talk about them.
3. You may think the world is completely dangerous, and no one can be trusted.

You may be jittery, or always alert and on the lookout for danger. You might suddenly become angry or irritable. This is known as hyperarousal. For example:

1. You may have a hard time sleeping.
2. You may have trouble concentrating.
3. You may be startled by a loud noise or surprise.
4. You may want to have your back to a wall in a restaurant or waiting room.