Trauma does not always leave behind a clear memory.
Some people remember frightening experiences in vivid detail. Others may have gaps, fragmented memories, or periods of their life that feel difficult to access.
This can sometimes be connected to dissociation.
What Is Dissociation?
Dissociation is a feeling of disconnection from yourself, your surroundings, your emotions, or your memories.
It can feel like:
- Being outside your body
- Feeling numb or unreal
- Losing track of time
- Feeling detached from what is happening
- Having difficulty remembering parts of an experience
Dissociation can occur during or after overwhelming experiences, but not everyone who experiences trauma will dissociate.
What Is Dissociative Amnesia?
Dissociative amnesia is difficulty remembering important personal information that goes beyond ordinary forgetting.
In some cases, this can involve traumatic or highly stressful experiences.
However, memory loss can have many causes, including sleep problems, depression, medications, substance use, head injuries, neurological conditions, and normal childhood forgetting.
Memory gaps alone do not prove that trauma occurred.
Trauma Can Affect Memory in Different Ways
Trauma can sometimes create a strange combination of remembering too much and remembering too little.
A person may have vivid flashes of:
- A smell
- A voice
- A room
- A physical sensation
- A moment of fear
But still have difficulty remembering the full sequence of events.
Research on PTSD shows that intrusive memories and difficulty voluntarily recalling parts of an experience can sometimes exist at the same time.
Is This the Same as “Repressed Memory”?
Not exactly.
The idea that the brain completely hides a traumatic memory and later releases a perfectly accurate version of it is controversial.
Human memory does not work like a video recording.
Memory is reconstructive, meaning it can be influenced by time, emotion, suggestion, repeated retelling, and new information.
That does not mean a survivor’s memories should automatically be dismissed.
It means memories should be approached with both compassion and care.
You Do Not Have to Remember Everything to Heal
Healing does not require recovering every missing memory.
Trying to force memories to return can sometimes create more distress and may influence how memories are reconstructed.
A trauma-informed mental health professional can help someone work with what they are experiencing now, including:
- Anxiety
- Fear
- Dissociation
- Nightmares
- Intrusive memories
- Shame
- Emotional numbness
- Relationship difficulties
- Hypervigilance
The goal does not have to be remembering every detail of the past.
Sometimes healing begins with a simpler question:
How is what I experienced affecting me today, and what do I need now?
Sources and Further Reading
Spiegel, D. et al. (2011). Dissociative Disorders in DSM-5. Depression and Anxiety.
https://pubmed.ncbi.nlm.nih.gov/21910187/
Brewin, C. R. (2018). Memory and Forgetting. Current Psychiatry Reports.
https://pmc.ncbi.nlm.nih.gov/articles/PMC6132786/
Radulovic, J., Lee, R., & Ortony, A. (2018). State-Dependent Memory: Neurobiological Advances and Prospects for Translation to Dissociative Amnesia.
https://pmc.ncbi.nlm.nih.gov/articles/PMC6220081/
McNally, R. J. (2007). Dispelling Confusion About Traumatic Dissociative Amnesia. Mayo Clinic Proceedings.
https://pubmed.ncbi.nlm.nih.gov/17803876/
Otgaar, H. et al. (2019). The Return of the Repressed: The Persistent and Problematic Claims of Long-Forgotten Trauma.
https://pmc.ncbi.nlm.nih.gov/articles/PMC6826861/
This article is for educational purposes only and is not a substitute for professional medical or mental health care. Significant or unexplained memory loss should be evaluated by a qualified healthcare professional.