After a Traumatic Event: What Is Common in the First Weeks

Something frightening has happened, to you or to someone close to you, and since then things may not feel the way they did before.

This article covers what official sources describe as common in the first days and weeks, what they say helps, what research found about early debriefing, and when to get assessed. It is general information. It cannot tell you what your own reactions mean, and nothing in it asks you to go back over what happened. If you were physically hurt, or you are not safe where you are, medical care and safety come first.

What reactions are common in the first days and weeks?

A wide range. The VA's National Center for PTSD says: "Right after a trauma, almost every survivor will find it hard to stop thinking about what happened." Its list of common reactions includes:

• In the body: stomach upset and trouble eating, trouble sleeping and feeling very tired, a pounding heart, rapid breathing, feeling shaky, and sweating.
• In feelings: feeling nervous, helpless, fearful or sad; feeling shocked or numb; being irritable; blaming yourself.
• In daily life: being unable to concentrate or make decisions, feeling jumpy and on guard, having dreams and memories that upset you, having problems at work or school, and avoiding people, places and things related to the event.

The VA is plain about what these mean: "Such stress reactions are normal and not weakness." The National Institute of Mental Health (NIMH) says: "It is natural to feel afraid during and after a traumatic situation."

A pounding heart and rapid breathing are on that list. Even so, do not assume that chest pain or trouble breathing is stress. The American Heart Association says to call 911 if you have chest discomfort or shortness of breath, which are among its warning signs of a heart attack. See a doctor about any other physical symptom that is new or severe. How trauma affects the body has more.

How long do these reactions usually last?

For most people they ease gradually. The VA says stress reactions such as fear, anxiety, jumpiness, upsetting memories and efforts to avoid reminders "will gradually decrease over time for most people." Its PTSD Basics page says: "Most people start to feel better after a few weeks." NIMH likewise says most people will recover from these symptoms and that their reactions will lessen over time.

None of these sources gives a schedule for any one person. The VA describes recovery as "an ongoing gradual process that takes time." Recovering more slowly than someone else does not mean you are doing it wrong.

What is acute stress disorder?

It is a diagnosis for heightened distress in the first month. The VA describes acute stress disorder (ASD) as "a mental health condition that captures heightened distress that takes place from 3 days to one month following trauma." PTSD is diagnosed one month or more after the event. Only a clinician can say whether either applies.

A VA page written for clinicians cites a meta-analysis of 70 studies which found that, on average, 20.4% of people experience ASD following a traumatic event. All of those studies used the older DSM-IV criteria.

Does ASD mean PTSD will follow? Sources put it differently. The American Psychiatric Association says: "About half of people with acute stress disorder go on to have PTSD." The VA's page for clinicians says the diagnosis was created in the hope that it would predict who later develops PTSD, but that ASD "has not been shown to effectively predict PTSD." A 2011 systematic review of 22 studies by Bryant shows how both statements can hold. It found that the diagnosis had reasonable positive predictive power, meaning the proportion of people with ASD who later developed PTSD, but poor sensitivity, meaning the proportion of people who developed PTSD who had first met the criteria for ASD. Its conclusion: "The acute stress disorder diagnosis does not adequately identify the majority of people who will eventually develop PTSD."

What do official sources say helps early on?

Mostly ordinary things. NIMH suggests:

• Avoid the use of alcohol or drugs.
• Spend time with trusted friends and relatives who are supportive.
• Try to maintain routines for meals, exercise and sleep.
• Engage in exercise, mindfulness or other activities that help reduce stress.
• Set realistic goals and focus on what you can manage.

On the first item, the VA warns that drinking or "self-medicating" with drugs "is a common, and unhealthy, way of coping with upsetting events." See trauma, alcohol and substance use.

After a disaster, responders may offer psychological first aid. The National Child Traumatic Stress Network describes it as an approach to help people "in the immediate aftermath of disaster and terrorism," designed to reduce initial distress. It "does not assume that all survivors will develop severe mental health problems or long-term difficulties in recovery." It is support from responders, not a treatment for PTSD.

If you are the one helping, see how to support someone after trauma.

Does debriefing or early treatment prevent PTSD?

Research on formal debriefing does not support it. A 2002 Cochrane review by Rose and colleagues looked at randomized trials of single-session debriefing within one month of a trauma. Eleven trials met its criteria, and the authors rated their quality as generally poor. The review found: "Single session individual debriefing did not reduce psychological distress nor prevent the onset of post traumatic stress disorder (PTSD)." In one trial, the risk of PTSD at one year was significantly higher among people who had been debriefed. The authors concluded: "Compulsory debriefing of victims of trauma should cease."

Guidelines point the same way. The 2023 VA/DoD guideline notes that Critical Incident Stress Debriefing "administered immediately after trauma exposure did not reduce the incidence of PTSD at 6-month follow-up compared with groups that received no debriefing." NICE, the United Kingdom's guideline body, says: "Do not offer psychologically-focused debriefing for the prevention or treatment of PTSD."

Two cautions. The review is old, its trials were of poor quality, and the sign of harm comes from a single trial. And all of this concerns one formal, single-session procedure. It is not about ordinary talking with family or friends.

On early treatment more broadly, the VA/DoD guideline found "insufficient evidence to recommend for or against psychotherapy or pharmacotherapy in the immediate post-trauma period" as a way to prevent PTSD. That means too little good research, not proof that nothing helps. For people diagnosed with acute stress disorder, it suggests trauma-focused cognitive behavioral psychotherapy. For people whose symptoms within a month of the event fall short of a PTSD diagnosis, NICE (UK) advises clinicians to consider active monitoring, with follow-up contact within one month.

When should you get assessed?

The VA says to talk to a doctor or mental health care provider if your symptoms last longer than a month, are very upsetting, or disrupt your daily life. NIMH says it is important to seek professional help "if symptoms do not improve over time or begin to interfere with daily life." The VA's list is not only about time: symptoms that are very upsetting or that disrupt daily life are on it too.

If you are thinking about harming yourself, call or text 988, or call 911 in an emergency.

Some help lines are for particular situations. Each detail below is from the organization's own site:

• Sexual assault. RAINN's National Sexual Assault Hotline is free, confidential and open 24/7. Call 800.656.HOPE, text HOPE to 64673, or chat online.
• Abuse by a partner. The National Domestic Violence Hotline is free, confidential and open 24/7. Call 1.800.799.SAFE (7233), text START to 88788, or chat online.
• Veterans and service members. The Veterans Crisis Line offers "24/7, confidential crisis support for Veterans and their loved ones." Dial 988 then press 1, or text 838255. You do not have to be enrolled in VA benefits or health care.

PTSD symptoms describes what a clinician looks for. Do I need trauma therapy? may help you decide.

Where does therapy fit?

For many people it will not be needed. The VA says: "Most people will recover from trauma naturally." For those whose symptoms persist, treatments have been studied. The 2023 VA/DoD guideline, which says it is not intended to define a standard of care, gives its strongest recommendation for PTSD to three trauma-focused psychotherapies: cognitive processing therapy, EMDR and prolonged exposure. It found insufficient evidence to recommend for or against psychodynamic therapy, which has been studied much less for PTSD. Types of trauma therapy goes through the research.

Dr. Rabin is a licensed clinical psychologist who offers trauma therapy in Brookline and by telehealth across Massachusetts. Her approach is psychodynamic, attachment-based, trauma-informed and mindfulness-based. The work moves at the client's pace, and the client decides what is discussed and when. You can request a free consultation of about 15 minutes through the contact page and ask whether she offers a particular treatment or would refer you.

Keep reading

• PTSD Symptoms: What Clinicians Look For
• Do I Need Trauma Therapy?
• Types of Trauma Therapy and What the Research Says
• All trauma guides

Sources

• VA National Center for PTSD, Common Reactions After Trauma (last updated September 25, 2026)
• National Institute of Mental Health, Coping With Traumatic Events (last reviewed May 2024)
• VA National Center for PTSD, PTSD Basics (page header: Last Updated October 2026)
• VA National Center for PTSD, Acute Stress Disorder (last updated February 27, 2026)
• American Psychiatric Association, What is Posttraumatic Stress Disorder (PTSD)? (physician review March 2025)
• Bryant RA, Acute stress disorder as a predictor of posttraumatic stress disorder: a systematic review. J Clin Psychiatry (2011)
• National Child Traumatic Stress Network, About PFA (Psychological First Aid) (accessed 2026)
• U.S. Department of Veterans Affairs and Department of Defense, VA/DoD Clinical Practice Guideline for Management of Posttraumatic Stress Disorder and Acute Stress Disorder (June 2023)
• NICE (UK), Post-traumatic stress disorder, NG116, Recommendations (2018)
• Rose S, Bisson J, Churchill R et al., Psychological debriefing for preventing post traumatic stress disorder (PTSD). Cochrane Database Syst Rev (2002)
• American Heart Association, Warning Signs of a Heart Attack (last reviewed December 12, 2024)
• RAINN, National Sexual Assault Hotline (accessed 2026)
• National Domestic Violence Hotline, home page (accessed 2026)
• U.S. Department of Veterans Affairs, Veterans Crisis Line (accessed 2026)

Last reviewed October 2026. This guide is general information, not medical advice or a diagnosis. If you are in crisis or thinking about harming yourself, call or text 988, or call 911 in an emergency.