Same Storm, Different Houses

I grew up in Poland under a communist regime. My grandmother survived the Holocaust and then lived most of her adult life under communism. Her hardship did not end with her. I could feel it in my mother and aunts, and in some ways in my own generation too.

My fascination started with books, long before science. As a young reader I fell in love with Russian literature, especially Dostoyevsky. Later I learned that his own life was a storm. In 1849 he was sentenced to death and led before a firing squad, then spared at the last moment and sent to four years of hard labor in Siberia. He carried that experience into everything he wrote. His characters suffer, break, and sometimes find redemption, and I kept wondering why some collapsed under their pain while others found a way through.

Later I read Viktor Frankl's Man's Search for Meaning. Frankl, a psychiatrist who survived the Nazi concentration camps, observed that people who held on to a sense of meaning often seemed better able to endure. His observation stayed with me, even though it is one man's experience rather than a scientific explanation. James Garbarino's Lost Boys showed me how early trauma and neglect can shape the lives of troubled young men. And Bessel van der Kolk's The Body Keeps the Score argued that trauma is not only a memory, but something that can affect the body and nervous system. Each book asked the same question in a different way, and I have been chasing it ever since.

In three decades of nursing, first in Poland and then in the United States, in ICUs, recovery rooms, and now psychiatry, I kept seeing the same puzzle. Two people go through the same terrible event. One struggles for years. The other heals and moves forward. Sometimes they are siblings, raised in the same home.

Why? That question led me to a field called epigenetics, and it has become a real passion of mine. Epigenetics studies how life experiences, including stress and trauma, may influence the way our genes are used. If that sounds complicated, don't worry. I will explain it in plain words below, along with what the science can and cannot tell us yet.

Imagine a strong storm moving through a neighborhood. Every house faces the same wind and rain. Afterward, the damage looks very different from house to house.

The storm was the same. The houses were not. Each was built with different materials, on different ground, and had been through different weather before.

It is also worth knowing that most people who live through trauma do not go on to develop lasting PTSD. Resilience is common. Epigenetics is one piece of this puzzle, not the whole explanation. Our responses to trauma also reflect inherited genetic differences, earlier experiences, relationships, the places we live, ongoing stress, physical health, and the support and treatment available to us. No single biological mechanism can fully explain why one person develops lasting symptoms while another does not.

First, a little about the stress system. When you face danger, your brain signals your adrenal glands to release stress hormones such as cortisol. This system is called the HPA axis. Once the danger passes, cortisol itself helps signal the system to settle down, a bit like a thermostat. Several genes help fine-tune that feedback. Much of the research on trauma and epigenetics has focused on these genes.

The studies below are early but important. Think of them as clues, not final answers.

The field has grown beyond small single-gene studies. In 2024, an international team combined data from 23 military and civilian groups, about 5,000 people who had all experienced trauma. They found 11 DNA methylation sites in blood that differed in people with PTSD. A 2024 review of 92 studies concluded that these markers are promising but not yet ready for clinical use.

The genes you were born with stay the same for life. But some epigenetic patterns can change over time, and researchers are studying how those changes relate to stress, recovery, and treatment.

In a small 2013 pilot study, Dr. Yehuda's team followed 16 combat veterans with PTSD through 12 weeks of trauma-focused therapy. In those who improved, methylation of the FKBP5 gene changed along with their symptoms. It was a small study, and larger studies are still limited. We do not yet know whether changes like this help cause recovery, simply reflect it, or differ from person to person. Still, it is a hopeful hint that biology and healing move together. (Yehuda et al., 2013)

What matters most for you today does not depend on epigenetics at all. These approaches are well supported for recovery after trauma:

When I think of my grandmother, my family, and the patients I care for, I no longer see weakness or failure. I see houses that weathered hard storms, each in its own way.

That is why I practice the way I do. I want to understand each person's whole story, including their biology, life experiences, relationships, and the conditions they live in, not just a list of symptoms. And I want every patient to know that how they responded to trauma is not a character flaw. It reflects biology meeting experience, and healing is possible.