Dissociative Identity Disorder Case Study: 28-Year-Old Graphic Designer from Thane Who Kept Losing Hours and Finding Things She Could Not Remember Doing
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Dissociative Identity Disorder Case Study: Patient Background
This dissociative identity disorder case study follows Ananya (name changed), a composite example that reflects how the condition commonly shows up and how it is assessed and treated at Calida Rehab. The details are illustrative and do not describe any one identifiable person.
Ananya is a 28-year-old graphic designer from Thane. She lives with her husband in a flat in Majiwada and works from home for a design studio. She grew up in a home where a relative was harsh and frightening, and she learned early to go quiet and switch off. As an adult she began losing stretches of time. She would find herself in a different room or on a different bus route with no memory of leaving, discover finished design files she did not remember making, and find messages on her phone in a tone that did not sound like her. Her husband noticed that on some days her voice, handwriting and food choices changed, and that she sometimes answered to a different name and did not recognise things he had told her the day before. She also had flashbacks, low mood and a sense of watching her own life from outside. After a missed client deadline and a frightening night when she could not recall how she had reached home, her husband brought her to Calida Rehab.
Before the case itself, a short note. Dissociative identity disorder (DID) is a mental health condition in which a person’s sense of identity is divided into two or more distinct personality states, with repeated gaps in memory that go beyond ordinary forgetting. It is closely linked with severe and repeated trauma in childhood, and community studies suggest that around 1 in 100 people may be affected. It is not the same as schizophrenia, and it is not an act or attention seeking. It is treatable. Because DID can look like other conditions, you may also want to read our PTSD case study and our borderline personality disorder case study. For more on how early trauma affects adults, see our article on childhood trauma in adulthood.
Symptoms: How Dissociative Identity Disorder Showed Up
Dissociative identity disorder is easy to miss because the person often hides it out of fear or shame, and may not know what is happening. Doctors look for the pattern below, which must cause distress or harm to daily life.
Core features of DID
- Two or more distinct personality states, each with its own way of thinking, feeling and behaving, which the person may experience as a sudden change in sense of self or of control
- Repeated gaps in memory for everyday events, important personal information or past events, beyond ordinary forgetting
- Finding objects, writing, messages or purchases with no memory of getting or making them
- Feeling cut off from oneself or one’s surroundings, as if watching life from outside or as if things are not real
- Hearing voices or thoughts that seem to come from inside the head
Other signs that often come with it
- Flashbacks, nightmares and strong reactions to reminders of past trauma
- Low mood, anxiety, panic and trouble sleeping
- Headaches and other body symptoms with no clear medical cause
- Sudden changes in voice, handwriting, tastes or skills
- Thoughts of self-harm during periods of distress
In this case: Ananya said she lost time most often during stress and could not predict when it would happen. She was shocked to find files she had no memory of making, and her husband had begun to feel that he was living with different versions of her. She was frightened, ashamed and afraid of being called mad, so she had told almost nobody. She also described an inner sense of other parts of herself that took over when she felt unsafe.
Doctors do not go by a single symptom. Everyone forgets things, and daydreaming is common, but DID involves repeated, distressing gaps and shifts that affect everyday life.
Why Dissociative Identity Disorder Is Often Missed or Misread
Dissociative identity disorder is often missed for years. Most people with it do not show obvious switches in front of others, and many work hard to hide their memory gaps. The signs are often mistaken for other conditions: voices inside the head can be mistaken for schizophrenia, mood changes for bipolar disorder, and unstable relationships for borderline personality disorder. Many people are first treated for depression, anxiety or panic alone, and the underlying trauma is never asked about. Stigma and fear of not being believed keep many from speaking up.
The risks are real. Without treatment, DID is linked with ongoing distress, depression, self-harm, substance use, and strain on work and family life. The outlook improves with the right care. Specialised, trauma-focused therapy delivered in stages helps many people feel safer, steadier and more in control of their daily lives.
In this case: Ananya had earlier seen two clinicians. One treated her for anxiety, and another suggested she was stressed and tired. Nobody had asked about her childhood or her memory gaps. When the psychiatrist did, she cried with relief and said no one had ever asked before.
Diagnosis: How Dissociative Identity Disorder Was Assessed at Calida Rehab
There is no blood test or scan for dissociative identity disorder. The diagnosis is made by a psychiatrist or clinical psychologist through a careful, patient assessment, often across several sessions, with attention to trust and safety. At Calida Rehab this typically includes:
- A detailed clinical interview about memory gaps, sense of self, flashbacks and life history, asked gently and without pressing for details of trauma
- Screening questionnaires and structured interviews for dissociation, such as the Dissociative Experiences Scale, used alongside clinical judgement
- A trauma and safety assessment, including risk of self-harm and current safety at home
- Ruling out medical causes, such as seizure disorders, head injury, sleep problems or the effects of alcohol and drugs, with tests such as an EEG where needed
- Screening for other conditions such as post-traumatic stress, depression, anxiety, psychosis and personality disorders, which can occur with DID or look like it
- Careful cultural understanding. In some communities, experiences of possession are part of religious or cultural practice. A clinician asks respectfully and considers DID only when the experiences are unwanted, cause distress or harm, and are not an accepted part of the culture or faith of the person
- Input from a family member, with the person’s consent
Telling DID apart from schizophrenia matters, because the treatment is different. In DID, voices are usually experienced as coming from inside and are linked to distinct identity states and memory gaps, and the person does not usually have the fixed false beliefs seen in psychosis. See our schizophrenia case study.
Result in this case: Ananya was diagnosed with dissociative identity disorder, with post-traumatic stress symptoms and depression. Tests found no medical cause for her memory gaps, and she did not have a psychotic illness. Learning that her experiences had a name, and that they made sense as a response to early trauma, was her first real turning point.
Treatment Plan for Dissociative Identity Disorder
No single treatment suits everyone. At Calida Rehab the plan is built after the assessment, and the family is involved when the person agrees.
Trauma-focused psychotherapy, in stages. Expert guidelines advise treating DID in phases. The first phase focuses on safety, stability and coping skills. Only when the person is steady does the work move to processing painful memories, and the final phase to building a connected, fuller life. Going too fast can make symptoms worse. Read more on our trauma therapy page.
Working with the whole person. The aim is not to fight or remove any part of the person. It is to build understanding, communication and cooperation between parts, so that the person feels more in control and loses less time.
Medicines play a limited role. No medicine treats DID itself. The psychiatrist may treat co-occurring depression, anxiety or sleep problems and reviews any prescription often. Habit-forming sedatives are avoided where possible.
A written safety plan. The plan lists warning signs, grounding steps, people to call and what the family should do in a crisis. It is reviewed at each stage.
No pressure to recover memories. Treatment does not rely on forceful methods to recover memories, because these can create confusion and distress.
Family involvement. Families learn what DID is, why it is not an act, and how to respond calmly and kindly. See our family therapy page.
In this case: Ananya’s team recommended a short stay of about a week for safety and assessment, followed by weekly outpatient therapy. Her husband joined family sessions. Her psychiatrist treated her low mood and poor sleep for a limited period and did not prescribe sedatives.
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Therapies Used in This Dissociative Identity Disorder Case Study
The therapies below were part of Ananya’s plan and are commonly used for dissociative identity disorder and trauma.
- Trauma-focused therapy: a staged approach that builds safety first, then helps the person process painful experiences at a pace they can manage. Read more on our trauma therapy page.
- Grounding and stabilisation skills: simple, practical steps to stay in the present, such as noticing five things you can see and hear, slow breathing and orienting to the date and place. These help when time starts to slip.
- Dialectical Behaviour Therapy (DBT) skills: skills for handling strong emotions and getting through a crisis without acting on urges. See our DBT page.
- Cognitive Behavioral Therapy (CBT): helps with anxiety, low mood and shame-based thoughts that come with trauma. See our CBT page.
- Individual counselling: regular one-to-one sessions with a steady therapist, which build the trust that this work depends on. See our individual counselling page.
- Family therapy: sessions that help families understand the condition, communicate calmly and rebuild trust. See our family therapy page.
Follow-Up Care After the First Phase
Treatment of dissociative identity disorder usually takes longer than for most conditions, often years, and progress is rarely a straight line. Follow-up usually includes:
- Weekly therapy sessions with the same therapist, so that trust can build
- Regular psychiatrist reviews, including a check of any medicine and a fresh look at risk
- A safety plan that is updated and shared with the family
- A plan for known triggers such as conflict, anniversaries, work deadlines and poor sleep
- Practice of grounding skills between sessions
- Support to avoid alcohol and drugs, which can increase dissociation
- Continued involvement of the family, where the person agrees
A hard week or a return of lost time does not mean treatment has failed. It is a signal to use the plan and contact the team early.
Outcome: What Recovery Looks Like After Dissociative Identity Disorder Treatment
What changed for Ananya over the first six months:
- Lost time: episodes became less frequent and shorter. She learned to spot early warning signs and use grounding skills.
- Inner communication: she began to understand her different states as parts of herself that formed to cope, and to talk with them rather than fear them.
- Flashbacks and sleep: flashbacks and nightmares eased, and her sleep improved.
- Mood: her depression lifted gradually, and her anxiety became easier to manage.
- Work: she returned to her design work with a steadier routine and no missed deadlines.
- Family: her husband said he understood her better and felt less afraid, and their home became calmer.
- Safety: she kept to her safety plan and reached out when stress rose.
It is worth being clear about what recovery means. It is not a quick cure, and it does not mean forcing parts of oneself away. It is a person who feels safer, loses less time, understands her own story, and has the skills and support to cope when hard moments come.
What the first six months of treatment usually look like
- Month 1: assessment, a written safety plan, a short stay if needed, and the start of therapy.
- Months 2 to 4: weekly therapy focused on safety, grounding and coping skills, with family sessions.
- Months 5 and 6: skills settle in, the team reviews progress, and the plan is adjusted. Work on painful memories begins only if the person is ready.
This is a general guide. Treatment of DID often continues for years, so the first six months are only the beginning, and every person moves at a different pace.
Key Takeaways from This Dissociative Identity Disorder Case Study
- Dissociative identity disorder is a trauma-related condition, not an act and not a sign of being mad.
- Repeated memory gaps, a divided sense of identity and feeling cut off from oneself are key features, and a diagnosis needs a careful assessment.
- It is often mistaken for schizophrenia, bipolar disorder, borderline personality disorder or depression.
- Trauma-focused therapy in stages, starting with safety and coping skills, is the core of treatment. Medicines treat co-occurring symptoms only.
- A written safety plan and family understanding lower risk and distress.
- Treatment often takes years, and many people become safer, steadier and more in control of daily life.
When Should You See a Doctor?
Please speak to a doctor or psychiatrist if you or someone you know:
- Loses time or has repeated gaps in memory that cannot be explained
- Finds things, messages or purchases with no memory of getting or making them
- Often feels cut off from themselves, as if watching life from outside
- Hears voices or thoughts that seem to come from inside the head
- Has flashbacks, nightmares or strong reactions linked to past abuse or neglect
- Has been treated for depression or anxiety but is not getting better
If you or someone you know has hurt themselves, talks about ending their life or cannot stay safe, do not wait. Call 112 or go to the nearest hospital at once, or call Tele-MANAS on 14416. Stay with the person until help arrives. You can also call our 24-hour helpline for a confidential conversation. Read more in our article on suicide prevention.
Dissociative Identity Disorder Case Study: Frequently Asked Questions
What is dissociative identity disorder?
Dissociative identity disorder is a mental health condition in which a person’s sense of identity is divided into two or more distinct personality states, with repeated gaps in memory beyond ordinary forgetting. It is closely linked with severe childhood trauma.
What are the main symptoms of dissociative identity disorder?
Common features include distinct identity states, repeated memory gaps, finding items or messages with no memory of them, feeling cut off from oneself, and hearing voices that seem to come from inside the head. Flashbacks, low mood and anxiety often occur too.
What causes dissociative identity disorder?
Severe, repeated childhood trauma, such as abuse or neglect, is the main factor linked to DID. It is thought to develop as a way for a young mind to cope with overwhelming experiences when escape is not possible. Not everyone who has had trauma develops it.
Is dissociative identity disorder real?
Yes. It is a recognised condition in the DSM-5-TR and the ICD-11, and it is not an act. Research has linked it to severe childhood trauma.
Is dissociative identity disorder the same as schizophrenia?
No. Schizophrenia is a psychotic illness involving fixed false beliefs and loss of contact with reality. In DID, the key features are a divided identity and memory gaps, and voices are usually experienced as coming from inside. A psychiatrist can tell them apart.
How is DID different from spirit possession experiences?
In some communities, possession experiences are part of religious or cultural practice and are not a disorder. A clinician considers DID only when the experiences are unwanted, cause distress or harm, and are not an accepted part of the culture or faith of the person.
How is dissociative identity disorder treated?
Treatment is usually trauma-focused psychotherapy delivered in stages. It begins with safety and coping skills, moves to processing painful memories when the person is steady, and ends with building a fuller life. It often takes years.
Is there a medicine for dissociative identity disorder?
No medicine treats DID itself. A psychiatrist may treat co-occurring depression, anxiety or sleep problems, and avoids habit-forming sedatives where possible.
How can family members help?
Learn about the condition, listen without judging, stay calm and kind during a crisis, avoid pressing for memories, take part in family sessions and look after your own wellbeing. If your family member is at risk, call 112 or Tele-MANAS on 14416.
Is my information kept private?
Yes. Assessment and treatment details are confidential and are shared with family or employers only with your consent.
Sources and Further Reading
This page is for information and is not a substitute for medical advice. The case described is a composite example, and details are illustrative. If you think you or someone you know may have a dissociative disorder, please see a doctor or psychiatrist for a full assessment. If anyone is at risk of self-harm, call 112 or Tele-MANAS on 14416 at once.
- American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR). 2022.
- International Society for the Study of Trauma and Dissociation. Guidelines for treating dissociative identity disorder in adults, third revision. Journal of Trauma and Dissociation, 2011; 12(2): 115-187.
- Dalenberg CJ, Brand BL, Gleaves DH, et al. Evaluation of the evidence base for the trauma and fantasy models of dissociation. Psychological Bulletin, 2012; 138(3): 550-588.
- Sar V. Epidemiology of dissociative disorders: an overview. Epidemiology Research International, 2011; Article ID 404538.
- World Health Organization. International Classification of Diseases, 11th Revision (ICD-11), 6B64 Dissociative identity disorder.