Acute, Chronic & Complex Trauma Explained

Trauma can affect anyone—and it doesn’t always look the same. Whether it stems from a single shocking event or a lifetime of hardship, trauma changes how we experience ourselves, others, and the world.

Mental health professionals often group trauma into three main categories: acute trauma, chronic trauma, and complex trauma. Understanding these distinctions can be a helpful first step in finding the support you need.

Acute Trauma

Acute trauma results from a single distressing or life-threatening event—such as a car accident, a natural disaster, or a physical assault. This type of trauma often causes a strong emotional reaction and may lead to symptoms like intrusive thoughts, nightmares, hypervigilance, or avoidance. While some people recover with time and support, others may develop post-traumatic stress disorder (PTSD).

Chronic Trauma

Chronic trauma occurs when distressing events happen repeatedly over time. This might include ongoing domestic violence, bullying, or exposure to war or gang violence. Chronic trauma can wear down the nervous system, leading to anxiety, depression, emotional dysregulation, or physical health issues. The cumulative impact can be profound.

Complex Trauma

Complex trauma refers to prolonged exposure to traumatic experiences, often beginning in childhood—such as neglect, abuse, or unstable caregiving. It can deeply affect a person’s sense of identity, safety, and capacity for connection. People with complex trauma may struggle with trust, self-worth, emotional regulation, and relationships.

Getting Support

Whatever type of trauma you've experienced, healing is possible. Therapies like EMDR, somatic therapy, and trauma-informed cognitive behavioral therapy (CBT) can help the brain and body process what happened and create space for relief and growth. You don’t have to face trauma alone—and understanding its shape is the first step toward recovery.

MELISSA GERSON, LCSW

Melissa Gerson is the founder of Columbus Park Center for Eating Disorders in New York City. Over the last 20-plus years, she has trained in just about every evidence-based eating disorder treatment available to individuals with eating disorders: a dizzying list of acronyms including CBT-E, CBT-AR, DBT, FBT, IPT, SSCM, FBI and more.

Among Melissa’s most important achievements has been a certification as a Family-Based Treatment provider; with her mastery of this potent and life-changing (and life-saving!) modality, she’s treated hundreds of young people successfully and continues to maintain a small caseload of FBT clients as she also focuses on leadership and management roles at Columbus Park.

Since founding Columbus Park in 2008, Melissa has trained multiple generations of eating disorder professionals and has dedicated her time to a combination of clinical practice, writing, and presenting.

https://www.columbuspark.com
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Cognitive Processing Therapy for Trauma: Change the Story, Heal the Wound

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All About EMDR for Trauma