Acute stress disorder: Signs, causes, and impacts

Reviewed by Agnes Ward, PhD, LP, CAADC, BCBA, LBA

Written by

therapist.com team

Last updated: 01/27/2026

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What is acute stress disorder?

Acute stress disorder (ASD) is a mental health condition that can sometimes occur in the first month after experiencing a trauma.¹

The acute stress disorder timeframe is specific: Symptoms and diagnosis occur between three days and four weeks after a traumatic event. This short window helps doctors and therapists identify people who need early support.

Acute stress disorder vs. PTSD

ASD can sometimes precede posttraumatic stress disorder (PTSD), a longer-lasting condition that also affects people who have experienced trauma.

One of the main differences between the two is timing. ASD occurs within the first month after trauma. Acute stress disorder can become PTSD when symptoms continue beyond the four-week mark.²

However, not everyone with ASD develops PTSD. In fact, many people who develop PTSD did not initially meet ASD criteria.³ This means ASD is just one possible predictor.

Signs and symptoms of acute stress disorder

Acute stress disorder symptoms fall into five main categories: intrusion, negative mood, dissociation, avoidance, and arousal.⁴

Intrusion symptoms include:

• Recurring, distressing memories of the trauma
• Nightmares or night terrors (especially common in children)
• Flashbacks where you feel like the trauma is happening again
• Strong physical or emotional reactions to reminders of the event

Negative mood shows up as a lessened ability to experience positive emotions, including happiness, success, or love.

Dissociation can make you feel:

• Detached from yourself and your emotions
• Unable to remember parts of what happened

Avoidance appears as efforts to stay away from:

• Thoughts, memories, and feelings about the trauma
• People, places, or things that remind you of what happened

Arousal symptoms include:

• Trouble falling or staying asleep
• Feeling irritable or having sudden outbursts
• Being constantly on alert
• Difficulty concentrating
• Jumping at sudden sounds or movements

If you’ve experienced trauma and are struggling, consider reaching out to a mental health professional. They can help you create coping strategies and develop healthy approaches for moving forward.

Acute stress disorder causes and risk factors

Traumatic events

Not everyone who experiences trauma develops ASD, but certain types of traumatic events are associated with a higher likelihood of developing it.

Research shows that that prevalence rates of ASD after trauma include:⁵

• 13% to 21% after motor vehicle accidents
• 24% after assault
• 36% after interpersonal trauma⁶

An estimated 20% to 90% of people experience at least one traumatic event in their lifetime, and about 19% of those trauma-exposed people develop ASD.⁷ Of those that do develop ASD, about 1.3% to 11.2% go on to develop long-term symptoms.⁸

Personal and biological risk factors

There’s limited research on risk factors for ASD specifically. However, because they so closely resemble each other, it’s assumed that risk factors identified for PTSD can also be applied to ASD. 

Factors that can increase a person’s risk of developing ASD before, during, and after experiencing or witnessing a traumatic event include:⁹

Before the trauma:

• Having a history of past trauma or mental health conditions
• Lower education levels
• Using avoidant coping styles¹⁰
• Certain personality traits, particularly neuroticism

During the trauma:

• The severity of what happened
• Physical injury
• Experiencing assault or sexual violence

After the trauma:

• Financial difficulties
• Lack of social support
• Physical pain
• Additional life stress

Impact of acute stress disorder

Acute stress disorder doesn’t just affect your emotions—it can touch every part of your life.

Mental and physical health

ASD affects both your mind and body in significant ways:

• ASD can lead to depression, anxiety, panic disorder, and substance use problems¹¹
• ASD patients face 24 times higher risk of suicide attempts and twice the overall mortality rate compared to people without ASD
• Stress responses to trauma can cause real physical changes, including pain and a weakened immune system¹²

If you’re in crisis, help is available.You can call or text the 988 Suicide & Crisis Lifeline at 988 anytime, 24/7.

Work and academic performance

ASD symptoms can make it hard to function at work or school. Avoidance behaviors might lead to missing work, poor performance, or even job loss. For some people, this creates financial hardship that adds more stress to an already difficult situation.

Relationships and social life

Trauma changes how you relate to others. Many people with ASD find their relationships suffering. You might pull away from friends and family, or find it hard to connect emotionally with your partner. This isolation can create a cycle where lack of support makes symptoms worse.

Acute stress disorder treatment options

The good news is that effective treatments exist for ASD. Getting help early can reduce your symptoms and lower your risk of developing PTSD.

Trauma-focused cognitive behavioral therapy (CBT) is the gold standard treatment for acute stress disorder. This type of therapy helps you:

• Process what happened in a safe environment
• Challenge unhelpful thoughts about the trauma
• Gradually face trauma reminders in a controlled way
• Build coping skills

For people diagnosed with ASD, research shows that trauma-focused CBT (including cognitive restructuring and exposure) reduces PTSD symptoms at three to six months compared to supportive counseling or being on a waitlist.¹³ The therapy can be done in person, by phone, or online.

Psychological first aid (PFA) offers another helpful approach, especially right after trauma. PFA focuses on:

• Making sure you’re safe and have basic needs met (food, shelter, safety)
• Providing emotional support and reassurance
• Connecting you with practical resources
• Teaching simple coping strategies

People who receive PFA report feeling calmer, more in control, and better able to function and help others.¹⁴

Currently, there’s no strong evidence that medications effectively treat ASD. While some medications help with PTSD, research hasn’t shown clear benefits for acute stress disorder specifically.¹⁵

Support strategies

While professional treatment is important, these strategies can help too:

Build your support network. Social support plays a powerful protective role. Higher levels of support are linked to fewer ASD symptoms.¹⁵ Connecting with understanding friends, family, or support groups can help ease the fear and isolation that often follow trauma.

Grow your healthcare team. Seek out healthcare providers for any physical changes or concerns you experience, whether you think a specific trauma is the source or not. Regular visits and involved care workers can help catch any worsening symptoms early.

Connect with a mental health professional.  A mental health provider can help you understand your symptoms and create a treatment plan tailored to your needs. Speak to your employer about employee resources, search for free or affordable care resources, or search our directory to find available therapists near you.