Trauma- A Four Part Series Part 1

Part 1: What Trauma Is and How It Affects Us

Trauma is a widely discussed but often misunderstood concept. In this four-part series, we will explore what trauma is, the different forms it can take, how it affects the brain and body, and what recovery looks like. We will also examine resilience, treatment options, ways to support someone who has experienced trauma, and common misconceptions that can interfere with healing.

The term trauma originally referred to a physical wound. In psychological terms, trauma describes an emotional injury that occurs when an experience overwhelms a person’s ability to cope. Trauma is not simply a stressful event. It is a condition induced by an event, or series of events, that feels so threatening, harmful, or destabilizing that it exceeds a person’s emotional processing capacity at the time it occurs.

An important point in understanding trauma is that it is a subjective experience. Two people can go through the same event and have very different emotional responses. What feels deeply traumatic to one person may not affect another in the same way. Factors such as past experiences, available support, coping skills, and individual temperament all influence how someone processes adversity. Trauma is not defined by a causative event itself, but by how it is experienced internally.

Traumatic events often involve sudden, violent, or life-threatening disruption. Examples include the unexpected death of a loved one, serious motor vehicle accidents, physical or sexual assault, exposure to combat, natural disasters such as earthquakes, or life-threatening illness. Even witnessing serious injury or death can overwhelm the nervous system (see my past blog about vicarious trauma). These events frequently shatter a person’s sense of predictability and safety, creating the feeling that catastrophe could happen again at any moment.

After a trauma inducing event, commonly called a crisis, it is usual for individuals to mentally replay what happened. They may find themselves repeatedly thinking about the experience and trying to make sense of it. This mental replay reflects the brain’s attempt to process an event that felt threatening or incomprehensible.

Trauma has measurable effects on the brain and body. When danger is perceived, the amygdala, an almond-shaped structure in the brain, activates the body’s survival system. It sends signals that trigger the release of stress hormones such as adrenaline and noradrenaline. As a result, the sympathetic nervous system becomes highly active, preparing the body for fight, flight, or freeze. Physical changes such as increase in heart rate, sharpening of attention, and tension of muscles may occur in preparation for defense.

In the immediate aftermath of trauma, emotional responses such as shock, fear, anger, anxiety, or even aggression also normally occur. Difficulty concentrating and a sense of helplessness are also common. These reactions are natural survival responses. In children, however, trauma may show up differently. A child might suddenly become clingy, develop new behavior problems, or struggle in school. Both adults and children may experience heightened sensitivity to potential threats.

For most individuals, these reactions gradually decrease. As the crisis resolves and time passes, the nervous system settles. The majority of people recover without long-term psychological difficulties. Strong social support and active coping skills play an important role in this process. Having people who provide reassurance, stability, and understanding helps reestablish a sense of safety. Only a small percentage of individuals, estimated between 3 and 10 percent, go on to develop persistent mental health conditions such as post-traumatic stress disorder (PTSD). While PTSD can be debilitating, it is not the inevitable outcome of trauma.

Trauma is common worldwide. Large international surveys indicate that the majority of adults report experiencing at least one traumatic event in their lifetime. Certain types of events account for a significant portion of trauma exposure, including witnessing serious injury or death, experiencing the unexpected loss of a loved one, being assaulted, surviving a life-threatening accident, or facing a life-threatening illness.

Even with its prevalence, however, trauma does not define a person’s future. Emotional distress following overwhelming events is part of the human survival system. Understanding this can reduce shame and self-blame.

This basic explanation about what trauma is lays the foundation for deeper exploration. In the next blog, we will examine the different types of trauma, including acute, chronic, complex, and secondary trauma, and consider how early life experiences can shape long-term health and well-being.

If you believe you have been affected by a traumatic event or would like to consult a professional counselor about any other mental health concern, please contact Olive Branch Counseling Associates at 708-633-8000. Appointments are available in person at our office located at 6819 167th Street in Tinley Park, IL 60477, or through convenient telehealth sessions. We look forward to supporting you.

Molly Vacha

Graduate Intern, 2026

Olive Branch Counseling Associates, Inc.

Reference

Psychology Today. (2019). Trauma. Psychology Today. https://www.psychologytoday.com/us/basics/trauma

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