Trauma and addiction are linked in proportion to how much trauma a person experienced. In Felitti et al.’s 1998 ACE Study, adults reporting four or more categories of adverse childhood experience carry 4 to 12 times the risk of alcohol use disorder, drug use disorder, depression and suicide attempt compared with adults reporting none.
According to a 2019–2020 CDC analysis, 62.8 % of U.S. adults report at least one adverse childhood experience. Integrated treatment that addresses trauma and substance use in one plan produces better outcomes than addiction treatment leaving the trauma unaddressed.
Highlights
- Amstadter, Ananda B. et al.’s 2023 Swedish population-register cohort in the European Journal of Psychotraumatology, covering about 1.5 million people over 23 years, found that post-traumatic stress disorder raises the risk of drug use disorder 3.7 times in men and 5.3 times in women.
- 62.8% of US adults report at least one adverse childhood experience, and addiction risk rises with each additional category reported
- Avoidance is a required symptom cluster for a PTSD diagnosis under DSM-5-TR, and avoiding trauma reminders often leads to substance use as a coping mechanism
- Trauma causes lasting alterations in amygdala function and brain structure, increasing vulnerability to addiction throughout life
- Integrated treatment that addresses trauma and substance use in one plan produces lower relapse rates than addiction treatment that leaves the trauma unaddressed
What Is Trauma?
Trauma is an emotional and psychological response to an event that overwhelms a person’s capacity to cope, ranging from a single incident such as a car accident to prolonged exposure such as childhood abuse or combat.
The impact of trauma varies between individuals. Two people experiencing the same event may have completely different responses based on factors like previous trauma exposure, support systems, and personal resilience. What constitutes trauma for one person may not affect another the same way.
Trauma can produce immediate effects like shock, denial, and emotional numbness. Long-term consequences include flashbacks, nightmares, severe anxiety, and difficulty maintaining relationships. Untreated trauma raises the risk of developing mental health disorders, including substance use disorders.
How Does Trauma Affect the Brain?
Trauma changes brain structure and function in three systems: the amygdala becomes hyperactive and holds the body in threat response, the hypothalamic-pituitary-adrenal axis dysregulates and raises stress reactivity, and the prefrontal cortex loses capacity for emotion regulation and impulse control.
Ressler, Kerry J.’s 2010 paper in Biological Psychiatry documents amygdala hyperactivity after trauma. The amygdala processes emotion and threat, and constant activation produces persistent hypervigilance, anxiety and fear.
Repeated trauma causes the brain’s stress response system to malfunction. The hypothalamic-pituitary-adrenal (HPA) axis becomes dysregulated, making individuals more reactive to stress. Childhood trauma particularly disrupts developing brains, damaging the systems that govern emotion regulation, impulse control, and decision-making.
Trauma alters brain function in the following ways:
Hyperarousal and Avoidance
Trauma causes survival responses to activate in non-threatening situations, creating insomnia, irritability, and exaggerated startle responses.
Avoidance is one of the four required symptom clusters for a PTSD diagnosis under DSM-5-TR, so it is present in everyone who meets criteria. What varies is which avoidance behaviors a person reports. Norris, Anne E. and Aroian, Karen J.’s 2008 study of 453 Arab immigrant women in the Journal of Traumatic Stress found that avoidance symptoms were endorsed less frequently than re-experiencing and arousal symptoms, and that people who fully met the avoidance criterion had worse symptom severity and functioning than those who met it only partially. People in recovery avoid the places, people and situations that carry trauma reminders.
Physical and Psychological Consequences
The U.S. Department of Veterans Affairs National Center for PTSD reports elevated rates of chronic pain, digestive disorders, cardiovascular disease and autoimmune conditions among trauma survivors. Traumatic experiences also lead to negative self-perception, harsh self-criticism, and feelings of worthlessness that increase vulnerability to substance abuse.
Why Does Trauma Lead to Addiction?
Trauma leads to addiction because substances temporarily quiet the symptoms it produces, including intrusive memories, hypervigilance and insomnia, and that relief reinforces repeated use until tolerance and physical dependence form.
Drugs and alcohol numb difficult feelings, quiet intrusive thoughts, and create artificial safety. This self-medication becomes a survival strategy.
However, substance use worsens trauma symptoms over time. Drugs interfere with brain function and prevent healthy coping development. The cycle intensifies as addiction creates additional trauma through damaged relationships, financial problems, and health complications.
Gielen, Nele et al.’s 2012 study in the European Journal of Psychotraumatology screened 423 patients in addiction treatment against 206 healthy controls: 97.4% reported lifetime trauma exposure and 36.6% screened positive for current PTSD, against lower rates among the 206 healthy controls.
Trauma also alters brain chemistry. Traumatic experiences disrupt dopamine pathways and stress response systems. Substances hijack these compromised systems, making natural pleasure harder to experience and deepening dependence on drugs and alcohol. Alcohol use disorder develops along this same dopamine pathway.
Which Types of Trauma Are Linked to Addiction?
Nine types of trauma are linked to substance use disorders: physical trauma, sexual trauma, emotional trauma, domestic violence, child abuse, neglect, medical trauma, war and combat trauma, and witnessing violence.
- Physical Trauma: Bodily harm from accidents, assaults, violence, or natural disasters.
- Sexual Trauma: Unwanted sexual contact, including rape, molestation, or sexual harassment. Sexual trauma has particularly strong links to substance use disorders.
- Emotional Trauma: Psychological abuse, verbal attacks, belittling, or emotional neglect.
- Domestic Violence: Physical, emotional, or sexual abuse within intimate or family relationships.
- Child Abuse: Physical, emotional, or sexual abuse of children by caregivers.
- Neglect: Failure to meet basic physical or emotional needs during childhood.
- Medical Trauma: Painful, invasive, or life-threatening medical procedures or diagnoses.
- War and Combat Trauma: Exposure to combat, military operations, or war-related violence.
- Witnessing Violence: Observing violence, death, or severe injury to others.
How Does Childhood Trauma Lead to Addiction in Adulthood?
Childhood trauma raises addiction risk in proportion to how much of it a person experienced, measured as adverse childhood experiences, because it disrupts brain development in the systems that govern emotion regulation and impulse control.
Aslam, Maria V. et al.’s 2024 CDC analysis in the American Journal of Preventive Medicine estimates that 62.8% of U.S. adults have past exposure to at least one adverse childhood experience, ranging from 54.9% in Connecticut to 72.5% in Maine.
The ACE Study found a dose-response relationship: addiction risk rises with the number of adverse childhood experiences. Adults reporting four or more categories carry 4 to 12 times the risk of alcohol use disorder, drug use disorder, depression and suicide attempt, and 1.4 to 1.6 times the risk of physical inactivity and severe obesity, compared with adults reporting none.
Children experiencing trauma often turn to substances during adolescence to cope with overwhelming feelings. Early substance use increases vulnerability because adolescent brains are still developing. Drug or alcohol use during this period disrupts normal brain maturation.
The ACE Study identified ten categories of childhood adversity: physical abuse, emotional abuse, sexual abuse, physical neglect, emotional neglect, mother treated violently, household substance abuse, household mental illness, parental separation/divorce, and incarcerated household member.
How Often Do PTSD and Addiction Co-Occur?
Between 20% and 50% of people entering substance use disorder treatment carry a lifetime PTSD diagnosis, and 25% to 51% of inpatients meet criteria, against 1.3% to 12.3% in the general population.
The two conditions reinforce each other, which is why they are treated in one plan rather than in sequence. The U.S. Department of Veterans Affairs National Center for PTSD estimates that about 6 in 100 people (6%) will have PTSD at some point in their lives, and about 5 in 100 adults have PTSD in any given year. Women develop PTSD at twice the rate of men, 8% against 4% across a lifetime.
PTSD causes intrusive memories, flashbacks, nightmares, severe anxiety, and uncontrollable thoughts about traumatic events. People with PTSD turn to drugs or alcohol to quiet these symptoms. Substances provide temporary relief but worsen PTSD over time by interfering with trauma processing.
Across treatment-seeking populations, 20% to 50% of people entering substance use disorder treatment carry a lifetime PTSD diagnosis, and 25% to 51% of inpatients meet criteria, against 1.3% to 12.3% in the general population. This high co-occurrence demonstrates the critical need for trauma-informed addiction treatment addressing both conditions simultaneously. For veterans struggling with these challenges, drug rehab programs for veterans can provide tailored support that addresses the unique experiences and needs of those who have served in the military.
What Are the Signs of Trauma in Adults?
Trauma signs in adults fall into five groups: emotional signs such as persistent anxiety and numbness, re-experiencing such as flashbacks and nightmares, avoidance of reminders, physical symptoms such as chronic pain and insomnia, and behavioral signs such as increased substance use.
- Emotional Signs: Persistent anxiety, depression, emotional numbness, difficulty experiencing positive emotions, irritability, feelings of shame or guilt, difficulty trusting others.
- Re-Experiencing: Flashbacks, nightmares, intrusive thoughts, severe emotional distress when reminded of trauma, and physical reactions to trauma reminders.
- Avoidance: Avoiding places or people related to trauma, avoiding thoughts about traumatic experiences, inability to remember important trauma aspects, and loss of interest in activities.
- Physical Symptoms: Chronic pain, digestive problems, headaches, difficulty sleeping, fatigue, rapid heartbeat, and sweating.
- Behavioral Signs: Increased substance use, risky behaviors, difficulty maintaining relationships, social withdrawal, and difficulty concentrating.
What Is the Trauma-Addiction Cycle?
The trauma-addiction cycle runs in four steps: a traumatic event produces symptoms such as flashbacks and hypervigilance, substances temporarily relieve those symptoms, tolerance and dependence form, and the consequences of addiction become new trauma that worsens the original symptoms.
The cycle begins with a traumatic experience, creating overwhelming emotional distress. Trauma symptoms like anxiety, flashbacks, and nightmares develop. Individuals discover that substances temporarily relieve these symptoms.
As substance use continues, tolerance and dependence form. Addiction creates new problems, including health issues, relationship conflicts, and financial difficulties. These consequences become additional trauma sources. Original trauma symptoms worsen, and substance use escalates further.
Breaking this cycle requires addressing both trauma and addiction simultaneously through integrated, trauma-informed treatment.
How Is Trauma-Related Addiction Treated?
Trauma-related addiction is treated by addressing both conditions in a single plan, using Accelerated Resolution Therapy, cognitive behavioral therapy, dialectical behavior therapy and motivational interviewing alongside medical care, rather than treating the substance use first and the trauma later.
Addiction treatment that leaves the trauma unaddressed carries higher relapse rates, because the driver remains.
Trauma-informed care for trauma and addiction recognizes the widespread impact of trauma and understands potential paths for recovery. This approach emphasizes physical, psychological, and emotional safety for both patients and providers. Treatment creates opportunities for survivors to rebuild a sense of control and empowerment.
Evidence-Based Therapies for Trauma and Addiction
The following are the evidence-based addiction therapies for trauma and addiction:
- Cognitive behavioral therapy for addiction (CBT): Helps identify and change negative thought patterns and behaviors. Teaches healthy coping skills addressing both trauma and addiction triggers.
- Dialectical Behavior Therapy (DBT): Focuses on emotion regulation, distress tolerance, interpersonal effectiveness, and mindfulness. Particularly effective for complex trauma.
- Accelerated Resolution Therapy (ART): Uses eye movements to reprocess distressing traumatic images in a small number of sessions. Reduces PTSD symptoms without requiring the client to describe the trauma in detail.
- Trauma-Focused CBT (TF-CBT): Addresses trauma in children and adolescents. Involves caregivers and focuses on reducing shame.
- Seeking Safety: Evidence-based treatment focusing on establishing safety in relationships, thinking, behavior, and emotions.
Holistic and Complementary Approaches
Comprehensive treatment includes mindfulness meditation for stress reduction, yoga for reconnecting with the body and processing physical trauma, art and music therapy for non-verbal trauma processing, and regular exercise for anxiety reduction and stress hormone regulation.
Medication-Assisted Treatment
Medications support recovery, including SSRIs for PTSD and depression, prazosin for nightmares, and naltrexone, buprenorphine, or methadone for opioid use disorders.
Specialized Care for Adolescents
Adolescents require developmentally appropriate care addressing brain development, family dynamics, peer influences, and identity formation. A family program for addiction treatment often plays a crucial role.
Getting Help for Trauma-Related Substance Use Disorders
If you are in crisis or thinking about suicide, contact the 988 Suicide and Crisis Lifeline: call or text 988, or chat at 988lifeline.org. Spanish-language services and ASL access are available. SAMHSA’s National Helpline, 1-800-662-HELP (4357), provides free, confidential treatment referral 24 hours a day in English and Spanish.
If you or someone you love struggles with trauma and addiction, specialized treatment can break the cycle and restore hope. Riverside Recovery of Tampa provides comprehensive, trauma-informed care that addresses both conditions simultaneously.
Our clinical team treats PTSD and other mental health conditions when they co-occur with a substance use disorder. We build individualized treatment plans from a biopsychosocial assessment, using Accelerated Resolution Therapy, cognitive behavioral therapy, dialectical behavior therapy and motivational interviewing, alongside yoga, mindfulness, creative art therapy and music therapy.
FAQ: Trauma and Addiction
What is the connection between trauma and addiction?
Trauma and addiction are closely linked because traumatic experiences alter brain function and create overwhelming emotional pain. Individuals often turn to drugs or alcohol to self-medicate trauma symptoms like anxiety, flashbacks, and hypervigilance, leading to substance use disorders.
How does childhood trauma lead to addiction?
Childhood trauma disrupts normal brain development, particularly in areas controlling emotion regulation and impulse control. Adults who report four or more categories of adverse childhood experience carry 4 to 12 times the risk of alcohol use disorder and drug use disorder compared with adults who report none, according to Felitti et al.’s 1998 ACE Study.
Can you recover from both trauma and addiction?
Yes. Integrated, trauma-informed treatment addresses both conditions in one plan rather than in sequence. Accelerated Resolution Therapy, cognitive behavioral therapy and dialectical behavior therapy process the trauma while building the coping skills that replace substance use.
What percentage of people with addiction have trauma?
Between 20% and 50% of people entering substance use disorder treatment carry a lifetime PTSD diagnosis. In Gielen et al.’s 2012 study of 423 patients in addiction treatment, 97.4% reported lifetime exposure to a traumatic event and 36.6% screened positive for current PTSD.
What is trauma-informed addiction treatment?
Trauma-informed treatment recognizes the widespread impact of trauma and integrates understanding of trauma into all aspects of care. This approach emphasizes safety, trustworthiness, peer support, collaboration, empowerment, and addressing both trauma and addiction simultaneously.
References
- Amstadter AB, Lönn S, Sundquist J, Sundquist K, Kendler KS. Post-traumatic stress disorder and drug use disorder: examination of aetiological models in a Swedish population-based cohort. Eur J Psychotraumatol. 2023;14(2):2258312. doi: 10.1080/20008066.2023.2258312
- Felitti VJ, Anda RF, Nordenberg D, Williamson DF, Spitz AM, Edwards V, Koss MP, Marks JS. Relationship of childhood abuse and household dysfunction to many of the leading causes of death in adults. The Adverse Childhood Experiences (ACE) Study. Am J Prev Med. 1998;14(4):245-58. doi: 10.1016/s0749-3797(98)00017-8
- Norris AE, Aroian KJ. Avoidance symptoms and assessment of posttraumatic stress disorder in Arab immigrant women. J Trauma Stress. 2008;21(5):471-8. doi: 10.1002/jts.20363
- Ressler KJ. Amygdala activity, fear, and anxiety: modulation by stress. Biol Psychiatry. 2010;67(12):1117-9. doi: 10.1016/j.biopsych.2010.04.027
- Gielen N, Havermans RC, Tekelenburg M, Jansen A. Prevalence of post-traumatic stress disorder among patients with substance use disorder: it is higher than clinicians think it is. European Journal of Psychotraumatology. 2012;3(1). doi: 10.3402/ejpt.v3i0.17734
- National Center for PTSD. How Common is PTSD in Adults? US Department of Veterans Affairs; Updated 2023. Available from: https://www.ptsd.va.gov/understand/common/common_adults.asp
- Aslam MV, Swedo E, Niolon PH, Peterson C, Bacon S, Florence C. Adverse Childhood Experiences Among U.S. Adults: National and State Estimates by Adversity Type, 2019-2020. Am J Prev Med. 2024;67(1):55-66. doi: 10.1016/j.amepre.2024.02.010
- Meeker EC, O’Connor BC, Kelly LM, Hodgeman DD, Scheel-Jones AH, Berbary C. The impact of adverse childhood experiences on adolescent health risk indicators in a community sample. Psychol Trauma. 2021;13(3):302-312. doi: 10.1037/tra0001004
- Centers for Disease Control and Prevention. Adverse Childhood Experiences (ACEs): Preventing Early Trauma to Improve Adult Health. Atlanta, GA: CDC; 2023. Available from: https://www.cdc.gov/violenceprevention/aces/index.html