To suffer trauma means different things to different people. While some are quick to forget about the painful thoughts, others cannot. Even if they want to, the unexpected flashbacks, the sleeplessness, the constant reminders of the painful experience may make it difficult to forget about the traumatic event because the symptoms of PTSD experienced are recurrent, involuntary, intrusive, and distressing. Distressing because the symptoms have been happening for more than a month not resulted from drugs, alcohol, or head injury. For example, someone involved in an auto accident may be anxious about anything that reminds him/her of the accident.