A self-screening questionnaire individuals can use to determine whether they have post-traumatic stress disorder is available at ADAA.org. Once they complete the questionnaire, they should print it out and take it to a health care professional, according to the Anxiety and Depression Association of America.
Among the criteria for a diagnosis of post-traumatic stress disorder diagnosis is exposure to an incident involving death or the threat of death, serious injury or violence, state the Mayo Clinic. Medical professionals render the diagnosis after conducting a complete psychological evaluation, obtaining information about the event, observing signs and symptoms that occurred after the event. The assessment may also include a physical examination.