Childhood Trauma

Types of childhood trauma

The original CDC-Kaiser ACE study measured ten experiences before age 18:

Other traumatic experiences include bullying, community or school violence, racism and discrimination, war and refugee experiences, serious accidents, medical trauma, natural disasters, and the sudden death of a loved one.

Complex or developmental trauma describes repeated, long-lasting trauma, usually by caregivers, which disrupts a child's sense of safety and attachment.

How trauma affects development

Children's brains and stress systems are still developing. Frequent or prolonged stress without a supportive adult, sometimes called toxic stress, keeps the body's stress response switched on. This can affect:

• the amygdala (threat detection), which becomes more reactive
• the prefrontal cortex (planning, impulse control and emotion regulation)
• stress hormone systems, immunity and inflammation
• the ability to form secure attachments

These are adaptations to danger, not character flaws, and they can change with safety and support.

Signs of trauma in children

Responses vary with age:

• Young children: clinginess, regression (bedwetting, baby talk), sleep problems, nightmares, tantrums, play that repeats the event, fear of separation
• School-age children: irritability, aggression, difficulty concentrating, falling grades, stomachaches and headaches, withdrawal, worry about safety
• Teenagers: risk-taking, substance use, self-harm, depression, anger, isolation, problems with relationships, sexualized behavior

Babies and toddlers who lack a consistent caregiver can develop reactive attachment disorder.

Signs of childhood trauma in adults

Childhood trauma can continue to affect adults years later. Common effects include:

• anxiety, hypervigilance and being easily startled
• depression, low self-worth, shame or guilt
• intrusive memories, nightmares and flashbacks (PTSD or complex PTSD)
• difficulty trusting others, fear of abandonment, or repeating unhealthy relationship patterns
• difficulty managing emotions, anger or numbness
• dissociation: feeling detached from yourself or surroundings
• substance use, disordered eating, self-harm
• chronic pain, fatigue and stress-related physical symptoms

Many people with ACEs do not develop problems, and having these signs does not mean someone was necessarily traumatized.

Long-term health effects

Research shows a dose-response relationship: the more ACEs, the higher the risk of:

• depression, anxiety, PTSD and suicide attempts
• substance use disorders and smoking
• heart disease, stroke, diabetes, COPD and some cancers
• obesity
• unemployment and relationship difficulties

These links are partly explained by stress biology and partly by coping behaviors such as smoking and drinking. Preventing ACEs and supporting affected children could prevent a large share of these outcomes.

Diagnosis and assessment

Childhood trauma itself is not a diagnosis. Clinicians assess the effects, such as PTSD, depression, anxiety, dissociative disorders, attachment disorders or substance use. They use trauma-informed interviews and validated questionnaires. Some primary care and pediatric practices screen for ACEs.

Treatment and healing

For children

• Trauma-focused cognitive behavioral therapy (TF-CBT): the best-studied treatment, involving the child and a safe caregiver.
• Child-parent psychotherapy for children under 6.
• Parent-child interaction therapy for behavior problems.
• Ensuring safety: stopping ongoing abuse, often with child protective services.

For adults

• Cognitive processing therapy (CPT), prolonged exposure (PE) and EMDR for PTSD
• Dialectical behavior therapy (DBT) for emotion regulation and self-harm
• Medicines such as SSRIs or SNRIs for depression, anxiety and PTSD symptoms
• treatment for substance use, sleep and physical health problems

Protective factors

At least one stable, caring adult relationship is the strongest buffer. Others include supportive schools and communities, routines, physical activity, sleep, and opportunities to build skills and confidence.

Frequently asked questions

What are the signs of childhood trauma in adults?

Common signs include anxiety, depression, low self-esteem, difficulty trusting others, intense emotions or emotional numbness, flashbacks or nightmares, dissociation, and using alcohol or drugs to cope. Chronic pain and stress-related illness are also linked. Not everyone with a difficult childhood has these effects.

What are adverse childhood experiences?

Adverse childhood experiences (ACEs) are potentially traumatic events before age 18, including abuse, neglect, domestic violence, and growing up with a parent who has substance or mental health problems or is in prison. More ACEs are linked to more health and social problems later in life.

Can you heal from childhood trauma?

Yes. Trauma-focused therapies such as CPT, prolonged exposure, EMDR and TF-CBT are effective for many people. Safe relationships, self-care and treatment of related conditions like depression or substance use also support recovery at any age.

How do I help a child who has experienced trauma?

Keep the child safe, stay calm and predictable, listen without pressing for details, reassure them it is not their fault, and keep routines. Seek help from a pediatrician or a therapist trained in child trauma. Report suspected abuse to child protective services.

Does childhood trauma affect physical health?

Yes. Large studies link adverse childhood experiences to higher rates of heart disease, diabetes, lung disease, obesity and some cancers in adulthood. Chronic stress effects on the body and coping behaviors such as smoking both contribute.