Acute stress reaction (the first month after trauma)

What it is

Acute stress disorder describes intense reactions in the immediate aftermath of trauma: intrusive memories or nightmares, feeling dazed, unreal or detached (as if watching oneself from outside), inability to feel positive emotions, avoidance of reminders, poor sleep and a hair-trigger startle. It is diagnosed when these symptoms last from three days up to one month after the event and significantly disrupt functioning.

It matters for two reasons. First, it tells survivors that overwhelming reactions in the early weeks are a recognised condition, not madness. Second, it identifies people at higher risk of developing PTSD, who benefit most from early follow-up.

How common is it

Acute stress reactions are common after serious trauma, and a meaningful share of survivors develop acute stress disorder in the first month, especially after assault, serious accidents, or disasters. Many people have strong reactions in the first days that settle on their own; the disorder is when intense symptoms persist and disrupt life within that first month.

What causes it

Acute stress disorder is a reaction to a recent traumatic event, such as an accident, violence, sexual assault, disaster, or a sudden death. The risk is higher when the trauma was severe, involved deliberate human cruelty, or where the person has had earlier trauma or little support. The intense early symptoms are the mind and body's alarm system overwhelmed, not a sign of weakness.

What helps in the first month

The evidence favours practical, humane support over forced talking. Safety first: shelter, medical care, contact with loved ones, accurate information. Gentle routines, sleep and limiting alcohol. Critically, research has shown that pressuring survivors to relive the event in single mandatory “debriefing” sessions does not prevent PTSD and can worsen outcomes; support should follow the survivor's pace.

For those with severe early symptoms, brief trauma-focused CBT delivered in the first weeks reduces the risk of chronic PTSD. Medication has little role at this stage beyond short-term help with sleep under medical guidance.

Acute stress in the African context

Across our region the causes are common: road crashes, violent crime, fires, floods, and conflict, often striking whole communities at once. Immediate needs, safety, shelter, medical care, and reaching loved ones, come first, and humane practical support matters more in these early days than pressing a survivor to talk. Distress in the first weeks is often understood only in spiritual terms, which can delay follow-up for those who go on to develop PTSD. Knowing that strong early reactions are a recognised, usually temporary response, and checking in afterward, is what protects recovery.

Helping someone

If someone close to you has just been through trauma, your steady presence helps.

• Make sure they are safe, and help with practical needs, shelter, medical care, reaching family, before anything else.
• Be present and let them talk if they want to, but try not to press them to relive the event before they are ready.
• Help them keep gentle routines and sleep, and reduce alcohol.
• Watch for symptoms that persist beyond a month, which point to PTSD, and encourage assessment then.
• Take any mention of self-harm seriously. Our find a therapist page can help.