Post-traumatic stress disorder is a psychiatric illness that can occur following a traumatic event, in which there is the threat of injury or death to you or someone else.

Alternative Names

PTSD

Causes, incidence, and risk factors

(PTSD) may occur soon after a major trauma, or can be delayed for more than six months after the event. When it occurs soon after the trauma it usually resolves after three months, but some people experience a longer-term form of the condition, which can last for many years. PTSD can occur at any age and can follow a natural disaster such as flood or fire, or events such as war or imprisonment, assault, domestic abuse, or rape. The terrorist attacks of September 11, 2001 in the U.S. may have caused PTSD in some people who were involved, in people who witnessed the disaster, and in people who lost relatives and friends. These kinds of events produce stress in anyone, but not everyone develops PTSD. We do not know what causes PTSD, but psychological, genetic, physical, and social factors are involved. PTSD alters the body’s response to stress by affecting stress hormones and neurotransmitters (chemicals that transmit information between our nerves). Previous exposure to trauma may increase the risk, which suggests that this kind of a reaction may be a learned response. Having good social support helps to protect against developing PTSD. In studies of Vietnam veterans, those with strong support systems were less likely to develop PTSD than those without social support. People with PTSD re-experience the event again and again in at least one of several ways. They may have recurrent distressing dreams and recollections of the event, a sense of reliving the experience (referred to as flashbacks), and/or become very distressed around the time of events that symbolize the event (such as anniversaries).

Signs and tests

There are no tests that can be done to make the diagnosis of PTSD. The diagnosis is made based on a certain set of symptoms that persist after a history of extreme trauma. Your doctor will do psychiatric and physical examinations to rule out other illnesses.

Treatment

The aim of treatment is to reduce the symptoms by encouraging the affected person to recall the event, to express feelings, and to gain some sense of mastery over the experience. In some cases, expressing grief helps to complete the necessary mourning process. Support groups provide a setting where people who have had similar experiences can share feelings, and are very helpful. Depression, alcohol or substance abuse (which commonly occur with PTSD), or associated medical conditions, may need to be treated before symptoms of PTSD can be effectively addressed. Behavioral therapy, a type of talking therapy, may be used to treat avoidance symptoms. This can include graded exposure and flooding, which means that the person is frequently exposed to the object that triggers symptoms, until he/she becomes accustomed to it, and no longer avoids it. Medicines that act on the nervous system may be used to reduce anxiety and other associated symptoms. Anti-depressants have been proven effective in treating PTSD, including newer medicines such as Prozac, Paxil, and Zoloft. Sedatives can help with sleep disturbance. Anti-anxiety medicines may be useful, but the benzodiazepines, a type of drug used to treat anxiety, can be addictive.

Support groups

Additional information about post-traumatic stress disorder and coping with a national tragedy is available from the American Psychiatric Association .

Expectations (prognosis)

The best prognosis, or outcome, depends on how soon the symptoms develop after the trauma, and on early diagnosis and treatment.

Complications

Calling your health care provider

While traumatic events like the September 11 tragedy can cause distress, not all feelings of distress are symptoms of PTSD. You should talk about your feelings with friends and relatives. If your symptoms persist longer, or are worse, than those of your friends, you should contact your doctor. You should seek help immediately by going to the emergency room or calling the local emergency number (such as 911) if you are feeling overwhelmed by guilt, if you are impulsive, thinking of hurting yourself, unable to contain your behavior, or if you are experiencing other very distressing symptoms of PTSD. You can also contact your doctor for help with ongoing problems such as recurrent thoughts, irritability, and problems with sleep.

Prevention

Counseling and crisis intervention soon after the event are important for people who have experienced extremely stressful situations. They could help prevent longer-term forms of PTSD and should be part of public health responses to groups at risk, such as disaster victims.