The individuals who were affected by the Boston Marathon bombing tragedy on April 15 are facing what could be a long, hard road to recovery.  This process can involve a struggle to sleep well.

Many people develop what doctors call “acute stress disorder” after a terrifying event. This can occur even in people who only hear about danger or harm that a close friend or relative experienced.

People with acute stress disorder may feel numb or “in a daze.” They have intense feelings of fear, helplessness and horror. This can produce efforts to avoid thinking or talking about what happened. The sufferer also may avoid people or places that are reminders of what occurred.

Sometimes this response is delayed. Symptoms may not appear until a few days or even weeks after the event. An acute stress disorder may last from only a couple days up to a month.

“Sleep problems are expected stress reactions in the first few weeks following traumatic events like the bombings in Boston,” said Dr. Anne Germain, who studies sleep disturbances in PTSD as associate professor of psychiatry and psychology at the University of Pittsburgh. “Other stress reactions are also expected – they are all normal reactions to unexpected events. Most people will bounce back without any kind of treatment or interventions. Intrusive thoughts and images at bedtime or in the middle of the night (including bad dreams and nightmares) again are expected NORMAL reactions to these events.”

When the problem lasts for more than one month it is called post-traumatic stress disorder (PTSD). Trouble sleeping and nightmares are two symptoms of PTSD.

Other common signs of PTSD include memory loss, depression and anger. Everyone who suffers from PTSD continues to