Acute stress disorder is a severe stress reaction in the first month after trauma, with intrusive memories, dissociation, avoidance and hyperarousal. First-line treatment is brief trauma-focused cognitive behavioral therapy, typically five to six sessions, which reduces the risk of developing PTSD. Medication is used sparingly for sleep and acute distress. Most people recover within weeks with early treatment.
That one-month window is an opportunity. Research shows that brief trauma-focused treatment delivered in the weeks after an event substantially reduces the chance of developing chronic PTSD. At Stedfast Psychiatry we see people quickly after trauma, provide evidence-based early treatment, manage sleep and acute anxiety carefully, and stay with them past the first month if symptoms continue. We serve Florida and South Carolina, where hurricanes, flooding and highway trauma make this kind of care especially relevant.
Symptoms of ASD
- Intrusive, distressing memories or images of the event
- Nightmares about the event or its themes
- Flashbacks, or feeling as if the event is happening again
- Feeling numb, detached or emotionally flat
- Feeling unreal, in a daze, or watching yourself from outside
- Inability to remember important parts of the event
- Avoiding thoughts, conversations, places or people that are reminders
- Difficulty falling or staying asleep
- Irritability, anger, jumpiness or an exaggerated startle response
- Trouble concentrating and constant alertness for danger
Causes and risk factors
Acute stress disorder follows exposure to actual or threatened death, serious injury or sexual violence, whether experienced directly, witnessed, learned about in a close family member, or encountered repeatedly through work, as in first responders and emergency staff. Common precipitants include motor vehicle crashes, assaults, hurricanes and floods, house fires, sudden medical emergencies such as a heart attack or ICU stay, industrial accidents and the violent or sudden death of someone close.
Not everyone exposed develops the disorder. Risk is higher with more severe or prolonged trauma, interpersonal violence rather than accidents, prior trauma or psychiatric history, peritraumatic dissociation (feeling unreal or detached during the event), a strong panic response during the event, lack of social support afterward, and ongoing stressors such as injury, financial loss or legal proceedings. Women are diagnosed about twice as often as men. Biologically, the disorder involves a fear response that fails to settle, with elevated stress hormones, heightened amygdala activity and disrupted sleep that interferes with the brain's normal processing of the memory.
Acute stress disorder develops in roughly 7 to 28 percent of people exposed to trauma, with rates around 13 to 21 percent after motor vehicle accidents and 20 to 50 percent after assault, rape or mass shootings.
Source: American Psychiatric Association, DSM-5-TR
About half of people who go on to develop PTSD initially met criteria for acute stress disorder, so the diagnosis identifies many but not all people at risk.
Source: Bryant, Journal of Clinical Psychiatry, 2011
In randomized trials, brief trauma-focused CBT delivered within weeks of a trauma reduced the rate of PTSD at six-month follow-up to about 8 to 20 percent, compared with roughly 56 to 67 percent after supportive counseling.
Source: Bryant et al., Journal of Consulting and Clinical Psychology, 1998 and American Journal of Psychiatry, 1999
Single-session psychological debriefing after trauma does not prevent PTSD, and some trials found higher rates of PTSD among those who received it.
Source: Rose et al., Cochrane Database of Systematic Reviews, 2002
How we diagnose it at Stedfast Psychiatry
The evaluation at Stedfast Psychiatry takes place as soon as possible after the event, by video if travel is hard. We ask about the trauma in as much detail as you can comfortably provide, when symptoms began, and how they affect your sleep, work and relationships. Diagnosis requires at least nine symptoms from the five clusters of intrusion, negative mood, dissociation, avoidance and arousal, beginning within a month of the event and lasting three days or more. We use the Acute Stress Disorder Scale and, as the month passes, the PCL-5 to track whether symptoms are resolving or persisting into PTSD.
We assess for head injury, concussion and pain, which share symptoms with acute stress disorder and need their own management; for depression, panic attacks and substance use that may be emerging; and for any ongoing danger, such as an abusive partner. We review medications given in the emergency room, including opioids and benzodiazepines, because some affect recovery. Labs are not routinely needed, but we coordinate with your medical providers when injuries are involved.
Treatment options
Trauma-focused cognitive behavioral therapy
Brief trauma-focused CBT is the treatment with the strongest evidence for acute stress disorder and for preventing PTSD. A typical course is five to six weekly sessions of 60 to 90 minutes, beginning about two weeks after the event once the immediate crisis has settled. It includes education about normal and abnormal stress responses, breathing and grounding skills, prolonged exposure to the memory through structured retelling until it loses its charge, gradual return to avoided places and activities, and cognitive work on the beliefs the trauma has installed, such as that the world is entirely dangerous or that you are to blame. In randomized trials, people who received this treatment in the first weeks were far less likely to have PTSD six months later than those who received supportive counseling. Written exposure therapy, a five-session structured writing approach, is an alternative with similar results. We do not use single-session psychological debriefing, which research shows does not prevent PTSD and may hinder recovery in some people.
Medication management
Medication plays a supporting role in acute stress disorder, and we use it deliberately. Sleep is the first priority, because sleep deprivation worsens every other symptom and interferes with memory processing; we favor prazosin for trauma-related nightmares and short-term trazodone or low-dose doxepin for insomnia over benzodiazepines, which have been associated with worse long-term outcomes after trauma and do not prevent PTSD. Propranolol, studied for preventing PTSD, has not shown consistent benefit and is not routinely used. Hydrocortisone given in the ICU has some evidence but is a hospital intervention. If symptoms are severe, if depression or panic is prominent, or if symptoms persist toward the one-month mark, we start an SSRI such as sertraline or paroxetine, both FDA-approved for PTSD, expecting benefit over four to eight weeks. We avoid sedating a person through the window when therapy is most effective.
What to expect
We aim to see people within days of a referral after trauma. The first visit, in person or by video, is a 60-minute evaluation focused on what you are experiencing now, your safety and your sleep, and it ends with a plan and practical steps for the coming week. Therapy typically runs five to six weekly sessions over about six weeks, and we check symptoms at each visit. If you are well by the end, we schedule one follow-up a few months out. If symptoms continue past one month, the diagnosis becomes PTSD and treatment continues without interruption with the same team. Telehealth is a good fit for many trauma survivors who cannot yet drive or leave home, and we serve all of Florida and South Carolina.
When to seek help
Seek care if, in the weeks after a frightening event, you are not sleeping, are reliving the event through memories or nightmares, feel numb or unreal, are avoiding driving, work or places connected to what happened, or are drinking more to cope. Early treatment works better than waiting to see if it passes. If you are having thoughts of suicide or of harming yourself or anyone else, call or text 988, go to the nearest emergency room, or call 911 if you are in immediate danger. If you are in danger from another person, the National Domestic Violence Hotline is 1-800-799-7233.
The first month after trauma
The weeks following a traumatic event follow a rough pattern. In the first days, shock, numbness and disbelief are common, and many people function on autopilot. Intrusive memories and nightmares usually appear within the first week as the mind begins processing what happened. Over the next two to three weeks, most people find the memories gradually losing intensity, sleep returning and avoidance easing as they resume normal activities. For a minority, symptoms stay fixed or escalate: sleep does not return, the memories remain vivid and unbidden, avoidance spreads, and the body stays on alert. That second trajectory is what acute stress disorder describes, and it is the group for whom early treatment matters most.
Distinguishing it from related conditions
Adjustment disorder follows stressors that do not involve threatened death or serious injury, such as a divorce or job loss, and lacks the intrusive re-experiencing of trauma. Panic disorder can be triggered by trauma but centers on fear of panic attacks themselves. Concussion and mild traumatic brain injury share poor concentration, irritability, sleep disturbance and headache, and the two often coexist after a crash or assault; we assess for head injury and coordinate with your physician. Depression may develop alongside acute stress disorder, especially after loss. Brief psychotic disorder is a rare response to severe stress and looks different, with hallucinations or delusions rather than intrusive memories. Grief after a sudden death involves yearning and sadness and may or may not include trauma symptoms, depending on how the death occurred.
What helps, and what does not, in the first weeks
Returning to routine as soon as physically possible, including work and driving, is protective, because avoidance feeds the disorder. Talking about the event with people you trust, at your own pace, helps most people; being pressured to recount it in detail before you are ready does not, which is why formal debriefing has fallen out of favor. Protecting sleep is essential: a consistent schedule, no alcohol as a sleep aid, and medication for nightmares when needed. Limiting media coverage of the event, especially after disasters and mass violence, reduces re-exposure. Alcohol, cannabis and sedatives feel helpful and prolong recovery. Physical activity reduces arousal and improves sleep.
Hurricanes, floods and community trauma
Florida and South Carolina residents face recurring natural disasters, and the trauma they produce has a distinctive shape: prolonged threat, displacement, loss of home and belongings, and a long tail of financial and bureaucratic stress that keeps the nervous system activated for months. Acute stress reactions after hurricanes are common and often dismissed as the normal stress of recovery. We treat them with the same brief trauma-focused approach, with attention to the ongoing stressors that distinguish disaster recovery from a single-event trauma, and we offer telehealth for patients who have been displaced within either state.
Prognosis
Most people with acute stress disorder who receive brief trauma-focused treatment recover fully within weeks, with PTSD rates at follow-up well under half of those seen with supportive care alone. Even without treatment, a majority of people improve over the first few months. The purpose of early care is to shift the minority who would otherwise develop chronic PTSD, a condition that can last years and that is harder to treat the longer it persists. If PTSD does develop, the same team continues treatment with the same evidence-based methods, extended over a longer course.
Frequently asked questions
Is acute stress disorder the same as PTSD?
They are closely related and are distinguished mainly by timing. Acute stress disorder is diagnosed from three days to one month after a trauma; if symptoms persist beyond a month, the diagnosis changes to PTSD. The symptoms overlap heavily, though acute stress disorder places more emphasis on dissociation, such as feeling numb or unreal. Treating acute stress disorder effectively cuts the chance that it becomes PTSD, which is why we see people quickly rather than waiting to see what happens.
Should I just wait and see if it passes?
Many people do recover on their own in the first weeks, and we do not treat every normal stress reaction. But if you meet criteria for acute stress disorder, the evidence favors early, brief treatment: those who receive trauma-focused CBT in the first month are much less likely to have PTSD months later than those who wait. Treatment is only five or six sessions. Waiting costs little if you recover, but it costs a great deal if you do not. An evaluation helps you make that decision with information.
Will I need medication?
Usually not as the main treatment. Therapy is first-line, and we are honest that no medication has been shown to prevent PTSD reliably. We do treat sleep, because sleep is where the brain processes what happened, using non-habit-forming options such as prazosin or trazodone. We avoid benzodiazepines after trauma; they feel calming but are linked to worse outcomes. If symptoms are severe or persist toward a month, an SSRI such as sertraline helps and is continued if PTSD develops.
Does insurance cover treatment after a trauma?
Yes. Acute stress disorder is a recognized diagnosis covered for evaluation, therapy and medication management by most major commercial plans and Medicare, which Stedfast Psychiatry accepts. After a car crash or workplace injury, auto insurance personal injury protection or workers' compensation may also cover treatment; our staff can help you understand which applies. For patients without insurance, a self-pay new-patient visit is $185.
Can I be seen by telehealth?
Yes, and after trauma it is often the best way to start. Many people cannot drive after a crash, cannot leave home easily, or are recovering from injuries. Evaluation and trauma-focused CBT work well by video for patients anywhere in Florida or South Carolina. We will suggest in-person visits at one of our 13 offices if that would help, and returning to driving or going out can be built into treatment as a goal.
What about my child who was in the accident with me?
Children and teens develop acute stress reactions too, and they often show them differently: clinginess, regression, tantrums, new fears, sleep problems, physical complaints or re-enacting the event in play. Trauma-focused CBT adapted for children, with parents closely involved, is highly effective. Our child and adolescent psychiatry team evaluates children after trauma and treats families together when more than one person was affected.
Is it normal that I feel nothing?
Yes. Emotional numbness, feeling detached or unreal, and watching events as if from outside are dissociative symptoms and are among the most common responses in the first days after trauma. They are the mind's way of regulating overwhelming input. In most people they fade within days to weeks. When they persist, they are a marker of higher risk for PTSD and a reason to begin treatment. Grounding skills taught in the first session help bring you back into the present.
I am a first responder or nurse. Does this apply to me?
Yes. Repeated occupational exposure to death, injury and violence qualifies as trauma, and acute stress disorder after a particularly bad call or shift is common and under-reported in first responders, emergency staff and military personnel. Early, confidential treatment is effective, and nothing is shared with your employer. We see first responders and healthcare workers across Florida and South Carolina, in person and by telehealth, with scheduling that accommodates shift work.
Where to get treatment for acute stress disorder
Evaluation and treatment for acute stress disorder is available at every Stedfast Psychiatry office and by video across Florida and South Carolina.
Related conditions
If you are thinking about harming yourself, call or text 988 now, or go to the nearest emergency room. This page is educational and does not replace an evaluation. Clinical content reviewed by Dr. David Husted, board-certified psychiatrist.