Acute stress vs PTSD

Acute stress after a frightening event is common and usually eases - here is how it differs from post-traumatic stress that needs support.

2 min read · Awareness resource · Reviewed 2026-09-15

After something frightening or overwhelming happens, it is normal to feel shaken. Understanding the difference between a normal stress response and something that needs professional support can help you know what to expect and when to reach out.

What it is

Acute stress is the mind and body's immediate reaction to a distressing or dangerous event, such as an accident, robbery or sudden loss. It can include shock, anxiety, difficulty sleeping, intrusive memories and feeling on edge. For most people, these symptoms ease over days to a few weeks as the nervous system settles and the event is processed.

Post-traumatic stress, sometimes assessed by a professional as PTSD, is when these reactions persist well beyond the initial period, remain intense, and start to significantly affect daily life, relationships or work. The difference is not about how "bad" the event was, but about how long the reactions last and how much they interfere with functioning. Only a qualified professional can assess whether someone meets the criteria for PTSD - this article is not a diagnostic tool.

Signs to notice

Common to both acute stress and post-traumatic stress:

Intrusive memories, nightmares or flashbacks of the event
Feeling jumpy, on edge or easily startled
Avoiding places, people or conversations that recall the event
Low mood, irritability or emotional numbness

What may point towards a longer-term difficulty worth assessing:

Symptoms continuing beyond a month with little improvement
Growing avoidance that shrinks your daily life and relationships
Persistent difficulty sleeping, concentrating or feeling safe

What helps

Give yourself permission to feel shaken. This is a normal response to an abnormal event, not a weakness.
Keep to gentle routines - regular meals, sleep and movement help the nervous system settle.
Talk about what happened with people you trust, at your own pace. You do not need to relive every detail to process an event.
Limit repeated exposure to distressing media coverage or retelling of the event, which can keep the nervous system activated.
Avoid using alcohol or substances to cope, as this can slow recovery and add new problems.
Be patient with yourself. Recovery from acute stress is rarely a straight line.

When to reach out for help

Reach out to a professional if symptoms have not started easing after about a month, if they are getting worse rather than better, or if they are affecting your ability to work, sleep, or maintain relationships. A professional can assess what you are experiencing and guide appropriate support - there is no need to manage this alone.

Getting help in South Africa

Cleared Mind's EAP counsellors are trained to support members through both acute stress and longer-term trauma responses, with confidential sessions available through your organisation's EAP access point. SADAG's Mental Health Line (011 234 4837) offers guidance and referrals for trauma-related support across South Africa.

If you or someone else is in immediate danger, reach out now. SADAG Suicide Crisis Helpline (24h): 0800 567 567 or SMS 31393. SAPS 10111, ambulance 10177, GBV Command Centre 0800 428 428.