Which of the following are signs and sysmptons post traumatic stress disorder?

Signs and symptoms of PTSD can include:

- Hypervigilance: This is a state of heightened alertness and awareness.

- Intrusive memories: These are vivid, unwanted, and recurrent memories of the traumatic event.

- Nightmares: These dreams often relate to the traumatic event and can be very disturbing.

- Avoidance: People with PTSD may avoid places, people, and activities that remind them of the traumatic event.

- Mood changes: People with PTSD may experience mood swings, depression, or irritability.

- Difficulty sleeping: People with PTSD may have trouble falling asleep and staying asleep.

- Difficulty concentrating: People with PTSD may have trouble paying attention and focusing.

- Physical symptoms: People with PTSD may experience headaches, nausea, or chest pain.