What is the definition of depersonalization?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Depersonalization is a mental health symptom where a person feels detached from themselves, as if watching their own thoughts, feelings, or body from the outside. Many describe it as feeling like an observer of their own life or being disconnected from reality.

This experience can be brief or ongoing, and may be triggered by stress, anxiety, trauma, depression, or certain medical conditions. Because depersonalization overlaps with many other conditions, identifying the root cause is essential to finding the right care.

If you're experiencing symptoms like these, understanding what's behind them is the first step toward feeling like yourself again. Taking a free, instant, online symptom check can help you clarify what may be going on and guide you toward the appropriate next steps — whether that's self-care, speaking with a doctor, or seeking specialized support.

Reviewed for medical accuracy: 07/15/2026

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Explanation

Depersonalization means feeling detached from yourself. Imagine watching a movie and seeing a character that looks just like you—but knowing deep down you are inside the movie. People who experience depersonalization might feel like they are not really there or that the feelings and thoughts they have don't belong to them. It is like being separated from your body or mind, which can be confusing or scary.

This feeling can happen during times of high stress, trauma, or when a person is very overwhelmed. Even though it might seem strange, these experiences are a way the brain copes when things are too much to handle. Scientists have studied depersonalization and noticed that it can affect how people see themselves and the world around them.

It does not mean that a person is "crazy" or dangerous; it is often linked to stress and anxiety and can be treated with support from mental health professionals. If you're experiencing symptoms like these and want to better understand what might be happening, try Ubie's free AI-powered symptom checker to help identify possible causes and next steps. Recognizing depersonalization is a good step toward getting help and learning ways to feel more connected to yourself again.

(References)

Sierra M, Berrios GE. Depersonalization: neurobiological perspectives. Biol Psychiatry. 1998 Nov 1;44(9):898-908. doi: 10.1016/s0006-3223(98)00015-8. PMID: 9807645.
Hunter EC, Sierra M, David AS. The epidemiology of depersonalisation and derealisation. A systematic review. Soc Psychiatry Psychiatr Epidemiol. 2004 Jan;39(1):9-18. doi: 10.1007/s00127-004-0701-4. PMID: 15022041.
Murphy RJ. Depersonalization/Derealization Disorder and Neural Correlates of Trauma-related Pathology: A Critical Review. Innov Clin Neurosci. 2023 Jan-Mar;20(1-3):53-59. PMID: 37122581; PMCID: PMC10132272.

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