Associated features of acute stress disorder include the individual experiencing heavily negative thoughts relating their role in the event or future harm. These symptoms can be misinterpreted by the individual as them having a diminished mental capacity due to frequent flashbacks or numbing of the traumatic event. Additional features of the disorder include panic attacks in the initial month and displaying chaotic or impulsive behavior. In children, sufferers can experience separation anxiety from a caregiver. Other symptoms include acute grief reactions and post-concussive symptoms (dizziness, headaches, etc).