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Illustration of a child showing how toxic stress affects the brain and body, and the health risks linked to ACEs

Understanding ACEs

October 04, 2026•3 min read

ACEs (Adverse Childhood Experiences) are serious childhood traumas that can result in toxic stress. Prolonged exposure to ACEs can create toxic stress, which can damage the developing brain and body of children and affect overall health. Toxic stress may prevent a child from learning or playing in a healthy way with other children, and can cause long-term health problems.

Illustration of a child showing how toxic stress affects the brain and body, and the health risks linked to ACEs

How toxic stress affects a child

  • Lowers tolerance for stress, which can result in behaviors such as fighting, checking out or defiance.

  • Increases difficulty in making friends and maintaining relationships.

  • Increases stress hormones which affect the body's ability to fight infection.

  • May cause lasting health problems.

  • Increases problems with learning and memory.

  • Reduces the ability to respond, learn, or figure things out, which can result in problems in school.

"I can't hear you! I can't respond to you! I am just trying to be safe!"

Survival mode response

Toxic stress increases a child's heart rate, blood pressure, breathing and muscle tension. Their thinking brain is knocked off-line. Self-protection is their priority.

Exposure to childhood ACEs can increase the risk of:

  • Adolescent pregnancy

  • Alcohol and drug abuse

  • Asthma

  • Depression

  • Heart disease

  • Intimate partner violence

  • Liver disease

  • Sexually-transmitted disease

  • Smoking

  • Suicide

ACEs (Adverse Childhood Experiences) can include:

  • Abuse: Emotional / physical / sexual

  • Bullying / violence of / by another child, sibling, or adult

  • Homelessness

  • Household: Substance abuse / mental illness / domestic violence / incarceration / parental abandonment, divorce, loss

  • Involvement in child welfare system

  • Medical trauma

  • Natural disasters and war

  • Neglect: Emotional / physical

  • Racism, sexism, or any other form of discrimination

  • Violence in community

Parents and caregivers can help

Three ways caregivers can help: help children manage emotions, create safe environments, and understand, prevent and respond to ACEs
  • Help children identify, express and manage emotions.

  • Create safe physical and emotional environments (home, school, community, systems).

  • Understand, prevent and respond to ACEs.

"…One of the biggest myths that we have to bust is that if you have experienced childhood adversity, there's nothing we can do about it."

– Nadine Burke Harris, MD, MPH, FAAP, Surgeon General of California

What is resilience?

Research shows that if caregivers provide a safe environment for children and teach them how to be resilient, that helps reduce the effects of ACEs.

What does resilience look like?

Having resilient parents and caregivers who know how to solve problems, have healthy relationships with other adults, and build healthy relationships with children.

Building attachment and nurturing relationships

Adults who listen and respond patiently to a child in a supportive way, and pay attention to a child's physical and emotional needs.

Building social connections

Having family, friends, neighbors, community members who support, help and listen to children.

Meeting basic needs

Provide children with safe housing, nutritious food, appropriate clothing, and access to health care and good education, when possible. Make sure children get enough sleep, rest, and play.

Learning about parenting, caregiving and how children grow

Understand how caregivers can help children grow in a healthy way, and what to expect from children as they grow.

Building social and emotional skills

Help children interact in a healthy way with others, manage emotions, communicate their feelings and needs, and rebound after loss and pain.


Special thanks to the Community & Family Services Division at the Spokane (WA) Regional Health District for developing and sharing the original parent hand-out. This resource was reviewed by the California Collaborative ACEs Learning and Quality Improvement Collaborative (CALQIC) Patient Community Advisory Board. Produced by PACEs Connection with support from Family Hui. ©2021 PACEs Connection.

PACEs Connection
PACEs Connection supports the worldwide positive and adverse childhood experiences (PACEs) movement by connecting researchers, practitioners, and communities working to prevent childhood trauma and promote healing.
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