Understanding Intergenerational Trauma: How Trauma Can Be Passed Down Through Generations

Trauma doesn't just affect us individually. It can ripple through families, communities, and generations.

Whether it stems from childhood abuse, neglect, war, racism, or systemic oppression — trauma leaves marks that often outlive the people who first carried it. One of the most overlooked aspects of trauma is its transgenerational impact: how it gets passed down from one generation to the next, often without anyone meaning for it to happen.

At Curious Mind Counseling, we work with intergenerational trauma — how it shows up, how it travels, and how it can be healed. This post is a quick tour: what it is, what the research says, and where healing begins.

What is Transgenerational Trauma?

Transgenerational trauma is the transmission of trauma's effects from one generation to the next. The mechanisms vary — some emotional, some behavioral, some biological — but the pattern is consistent: children and grandchildren of trauma survivors carry pieces of experiences they never directly lived through. Those pieces can shape mental health, attachment, identity, and worldview.

A clear example is childhood abuse. A parent who was abused as a child may struggle to parent in ways that feel safe — unintentionally passing down cycles of harm, neglect, or emotional unavailability. The same patterns show up around racial or cultural trauma: parents who carry the weight of historical violence may pass that weight, knowingly or not, through their behaviors, attitudes, and emotional responses.

The Mice Study: Trauma Transference in Action

To understand how this might work biologically, one of the most striking studies came out of Emory University School of Medicine. Researchers Brian Dias and Kerry Ressler exposed male mice to a specific scent — acetophenone — while delivering a mild electric shock. The mice learned to fear the smell.

Then they had babies.

When the offspring of those mice — who had never experienced the shock — were exposed to the same scent, theystartled too. They had inherited a sensitivity to a fear they had no memory of (Dias & Ressler, 2014).

And here's the kicker: the same response appeared in the grandchildren of the original mice.

The mechanism wasn't a change in the DNA itself. It was epigenetic — a change in how genes were expressed, specifically through DNA methylation in the sperm of the fear-conditioned fathers. The genes stayed the same. What changed was the instructions for how to read them.

This study didn't prove that humans inherit trauma the same way mice do. But it cracked open a question scientists had been circling for decades: can the experiences of one generation leave a biological signature in the next?

From Mice to Humans

Human research is harder. You can't fear-condition people in a lab and follow their grandchildren for twenty years. But there's one population that has been studied with unusual depth — children and grandchildren of Holocaust survivors.

Dr. Rachel Yehuda at Mount Sinai and her colleagues have spent decades studying this group. In a landmark 2016 study, they found epigenetic changes in a stress-regulation gene called FKBP5 — present in Holocaust survivors and in their adult children (Yehuda et al., 2016). The methylation patterns weren't identical between parent and child, but they were related, suggesting that parental trauma had left a measurable mark on the next generation's biology.

A broader review by Yehuda and Lehrner (2018) lays out the full picture: intergenerational trauma effects are real, the mechanisms include epigenetic changes, in-utero exposure, and early postnatal care, and the effects show up across many populations — combat veterans and their children, descendants of genocide survivors, survivors of mass violence and displacement.

One important note: epigenetic changes aren't a life sentence. They're dynamic. They can shift. That's part of why healing is possible.

How Does Intergenerational Trauma Affect Us?

The impact is wide. A few patterns that show up most often:

• Mental Health Vulnerability: Children of trauma survivors are at higher risk for anxiety, depression, and PTSD — even without experiencing trauma directly themselves (Yehuda & Lehrner, 2018).

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• Attachment Difficulties: When parents are emotionally unavailable due to unprocessed trauma, their kids often struggle to form secure attachments. The pattern repeats unless something interrupts it.

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• Behavioral Inheritance: Coping strategies built in response to trauma — avoidance, hypervigilance, emotional shutdown — get modeled and passed forward. Kids learn what they live.

Beyond individuals and families, intergenerational trauma also affects communities. Descendants of enslaved people, of genocide survivors, of forced displacement — they can carry collective trauma that shapes identity, self-worth, and cultural connection, sometimes generations after the original violence (Yehuda & Lehrner, 2018).

Healing from Intergenerational Trauma

Healing is possible. It's also rarely fast, and it almost never happens by accident.

A few starting points:

1. Recognize the Patterns. You can't change what you can't see. Naming the ways trauma may have moved through your family is itself a powerful act. It separates who you are from what you've been handed.

2. Seek Therapy. Trauma-informed therapy is a space to explore how past generations' experiences are shaping yours — and to start moving differently. Healing happens in relationship, not in isolation.

3. Practice Self-Compassion. Healing isn't linear. You'll have hard days. You'll have setbacks. Be kind to the version of you doing the work — they're carrying more than they were ever asked to.

4. Build New Relationships. Healthy, secure connections create new patterns. They can literally reshape what attachment feels like. Find your people. Let them in.

5. Have the Conversation. Sometimes healing comes from open, honest dialogue with family members — hearing the stories that shaped them, naming what was never named. These conversations can be hard. They can also be transformative.

Conclusion

Intergenerational trauma is invisible, heavy, and easy to miss until you start looking for it. But understanding that it exists — and that it isn't your fault — opens a door. Whether you're working through trauma from your own life or noticing its echoes in your family, healing is possible.

Ready to take the next step? Visit www.curiousmindcounseling.com or email me at info@curiousmindcounseling.com to schedule a free consultation.

References

Dias, B. G., & Ressler, K. J. (2014). Parental olfactory experience influences behavior and neural structure in subsequent generations. Nature Neuroscience, 17(1), 89–96. https://doi.org/10.1038/nn.3594

Yehuda, R., Daskalakis, N. P., Bierer, L. M., Bader, H. N., Klengel, T., Holsboer, F., & Binder, E. B. (2016). Holocaust exposure induced intergenerational effects on FKBP5 methylation. Biological Psychiatry, 80(5), 372–380. https://doi.org/10.1016/j.biopsych.2015.08.005

Yehuda, R., & Lehrner, A. (2018). Intergenerational transmission of trauma effects: Putative role of epigenetic mechanisms. World Psychiatry, 17(3), 243–257. https://doi.org/10.1002/wps.20568