When the foundation of trust is broken in a relationship, the effects extend far beyond the event itself. Infidelity and other betrayals often leave partners struggling with a deep sense of shock, loss, and disorientation. Research shows that betrayal trauma doesn’t just cause emotional distress — it can affect the brain, body, and overall mental health in profound ways.
The Trauma Response in Betrayal
The Trauma Response in Betrayal
Betrayal trauma activates the same survival systems in the brain as other forms of trauma. Partners may experience intrusive thoughts, hypervigilance, or even flashbacks — all signs of the nervous system struggling to regain a sense of safety.
Research spotlight: Studies confirm that betrayal trauma is associated with PTSD-like symptoms, including nightmares, hyperarousal, and emotional numbing (Freyd, 1996; Goldsmith et al., 2012).
Effects on Mental Health
Effects on Mental Health
Betrayal trauma can contribute to:
Anxiety and hypervigilance: Constantly scanning for more signs of deception.
Depression: Feelings of hopelessness, shame, and loss of identity are common.
Lower self-esteem and self-worth: Questioning one’s value or “why this happened.”
Difficulty trusting: Extending beyond the partner to other relationships.
Research spotlight: A 2015 study found that individuals who experienced infidelity reported significantly higher levels of depression, anxiety, and distress compared to those who had not (Gordon & Baucom, 2015).
The Body Keeps the Score
The Body Keeps the Score
Trauma isn’t just emotional — it shows up in the body. Many people report physical symptoms such as sleep disturbances, appetite changes, digestive issues, or chronic stress responses.
Research spotlight: Betrayal trauma can dysregulate the hypothalamic-pituitary-adrenal (HPA) axis — the body’s stress response system — contributing to long-term health issues (Lanius et al., 2010).
Attachment & Relational Wounds
Attachment & Relational Wounds
Because betrayal often comes from a trusted partner, it cuts directly into attachment bonds. This creates a unique kind of trauma: the person you would normally go to for comfort becomes the source of the pain.
Research spotlight: Attachment research shows that betrayal by an attachment figure undermines one’s internal sense of safety and can trigger profound relational distress (Mikulincer & Shaver, 2007).
Healing and Moving Forward
Healing and Moving Forward
Understanding the mental health impact of betrayal trauma helps survivors recognize that their symptoms are not signs of weakness — they are the body and mind’s natural response to trauma. With the right support, healing is not only possible, but likely. Therapy, nervous system regulation practices, and supportive relationships provide the foundation for recovery.
If you’re navigating the aftermath of betrayal, know that what you’re feeling is valid. These symptoms are not “just in your head” — they are real responses to real injury. Therapy offers a space to process the trauma, rebuild safety, and begin the journey toward healing.
Freyd, J. J. (1996). Betrayal Trauma: The Logic of Forgetting Childhood Abuse. Harvard University Press.
Goldsmith, R. E., Freyd, J. J., & DePrince, A. P. (2012). Betrayal trauma: Relationship to physical health, psychological distress, and a written disclosure intervention. Journal of Trauma & Dissociation.
Gordon, K. C., & Baucom, D. H. (2015). Understanding infidelity: Correlates in a national random sample. Journal of Family Psychology.
Lanius, R. A., Vermetten, E., & Pain, C. (2010). The Impact of Early Life Trauma on Health and Disease. Cambridge University Press.
Mikulincer, M., & Shaver, P. R. (2007). Attachment in Adulthood: Structure, Dynamics, and Change. Guilford Press.
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