Children and adolescents who experience a trauma such as a death in the family, natural distaster, physical abuse, or sexual abuse may develop symptoms of Posttraumatic Stress Disorder (PTSD) including nightmares, anxiety when exposed to things that remind him/her of the trauma, avoiding thoughts and feelings related to the event, irritabilty, anger outbursts, change in sleep patterns, difficulty concentrating, and diminished interest in activities he/she once enjoyed. Treatment of trauma can take time and involves exposure to the traumatic experience such as telling the story of the trauma several times or playing out the trauma.