Change in Personality
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Reviewed By:

Weston S. Ferrer, MD

Weston S. Ferrer, MD (Psychiatry)

Weston Ferrer is a physician leader, psychiatrist, and clinical informaticist based in San Francisco. With nearly a decade of experience in academia and more recent immersion in industry, he has made significant contributions to the fields of digital health, health tech, and healthcare innovation. | As an Associate Professor at UCSF, Weston was involved in teaching, leadership, and clinical practice, focusing on the intersection of technology and mental health. He recently led mental health clinical for Verily (formerly Google Life Sciences), where he applied his expertise to develop innovative solutions for mental healthcare using the tools of AI/ML, digital therapeutics, clinical analytics, and more.. | Weston is known for his unique ability to innovate and support product development while bringing pragmatism to technology entrepreneurship. He is a strong advocate for patient-centered care and is committed to leveraging technology to improve the health and well-being of individuals and communities. |

Yu Shirai, MD

Yu Shirai, MD (Psychiatry)

Dr. Shirai works at the Yotsuya Yui Clinic for mental health treatment for English and Portuguese-speaking patients. He treats a wide range of patients from neurodevelopmental disorders to dementia in children and participates in knowledge sharing through the Diversity Clinic.

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Content updated on Mar 7, 2024

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  • Personality is different all of a sudden

  • Personality changed

  • Rapid change in personality

  • Personality change

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About the Symptom

Anxiety, bipolar disorder, depression, other psychiatric and neurological conditions  can alter one's personality.

When to see a doctor

Seek professional care if you experience any of the following symptoms

  • Personality change

Possible Causes

Generally, Change in personality can be related to:

  • Schizophrenia

    A psychotic disorder characterized by disturbances in thinking (cognition), emotional responsiveness, and behavior, with an age of onset typically between the late teens and mid-30s. Hearing voices and/or believing things that aren't consistent with reality are common symptoms. The exact cause is unknown, but a mix of genetic, psychological, and environmental factors are likely responsible.

  • Dissociative disorder

    Dissociative disorder is a mental disorder that involves experiencing a disconnection and lack of continuity between thoughts, memories, surroundings, actions, and identity. People with dissociative disorder escape reality in ways that are involuntary and unhealthy, causing problems with functioning in everyday life.

  • Alzheimer dementia (AD)

    Alzheimer's disease is the most common cause of dementia. The brain shrinks, affecting memory and behavior. Symptoms worsen over time and can interfere with daily life. Increasing age raises the risk for Alzheimer dementia.

  • Adjustment disorder
  • Progressive subcortical vascular encephalopathy
  • Sleep disorder
  • Diffuse axon injury

Related serious diseases

Sometimes, Change in personality may be related to these serious diseases:

  • Encephalitis / encephalopathy

    Encephalitis and encephalopathy are brain conditions that can result in permanent damage. Encephalitis refers to brain inflammation, while encephalopathy is a broad term for any brain disease or disorder. Several causes can lead to these conditions, including infections, trauma, metabolic problems, drugs, and lack of oxygen to the brain.

  • Hepatic encephalopathy
  • Chronic subdural hematoma

Doctor's Diagnostic Questions

Your doctor may ask these questions to check for this symptom:

  • Do you feel your personality has changed?

  • Have you temporarily lost consciousness?

  • Do you have headaches or a heavy feeling in your head?

  • Do you have a fever?

  • Do your arms or legs feel weak?

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Find Similar Symptoms

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Reviewed By:

Weston S. Ferrer, MD

Weston S. Ferrer, MD (Psychiatry)

Weston Ferrer is a physician leader, psychiatrist, and clinical informaticist based in San Francisco. With nearly a decade of experience in academia and more recent immersion in industry, he has made significant contributions to the fields of digital health, health tech, and healthcare innovation. | As an Associate Professor at UCSF, Weston was involved in teaching, leadership, and clinical practice, focusing on the intersection of technology and mental health. He recently led mental health clinical for Verily (formerly Google Life Sciences), where he applied his expertise to develop innovative solutions for mental healthcare using the tools of AI/ML, digital therapeutics, clinical analytics, and more.. | Weston is known for his unique ability to innovate and support product development while bringing pragmatism to technology entrepreneurship. He is a strong advocate for patient-centered care and is committed to leveraging technology to improve the health and well-being of individuals and communities. |

Yu Shirai, MD

Yu Shirai, MD (Psychiatry)

Dr. Shirai works at the Yotsuya Yui Clinic for mental health treatment for English and Portuguese-speaking patients. He treats a wide range of patients from neurodevelopmental disorders to dementia in children and participates in knowledge sharing through the Diversity Clinic.

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