Mental health

The addiction and trauma connection: Why they occur together

Published November 3, 2024 · 8 min read · Updated April 2026

Reviewed for accuracy by licensed clinical professionals.

Trauma and addiction are so intertwined that treating one without addressing the other almost guarantees relapse.

The ACE study

The Adverse Childhood Experiences study demonstrated a dose-response relationship between childhood trauma and addiction. Each ACE category increases alcoholism risk by 2-4x. A person with 4+ ACEs has 7x the risk of alcohol addiction and 4.7x the risk of illicit drug use.

The neuroscience

Trauma chronically activates the stress response system (HPA axis), producing elevated cortisol, hypervigilance, and emotional dysregulation. Substances temporarily normalize this system, providing the only relief the person has experienced. This is not weakness; it is neurobiology.

Integrated treatment

Trauma-informed care as the treatment foundation. Trauma processing (EMDR, CPT, PE) after initial addiction stabilization. Addressing both conditions simultaneously. Understanding substance use as an attempt to manage trauma symptoms, not a separate problem.

Authoritative sources

This article references guidelines from: SAMHSA · NIDA · ASAM

Frequently asked questions

Why do trauma and addiction occur together?

Trauma chronically activates the stress response. Substances temporarily normalize it. This neurobiological cycle drives co-occurrence.

What is the ACE study?

The Adverse Childhood Experiences study showing direct dose-response relationship between childhood trauma and adult addiction, disease, and early death.

Should trauma be treated during addiction recovery?

Yes. After initial stabilization, trauma processing should begin. Treating addiction without addressing trauma leads to relapse.

Disclaimer: Informational only. Not medical advice. SAMHSA: 1-800-662-4357.