Schizophrenia: What It Is, What Causes It, and How It's Treated
Schizophrenia is a treatable mental health condition. Learn the WHO/DSM-5 definition, key symptoms, causes, how it’s diagnosed, and which treatments work.
MBBS, MD, DNB(Psychiatry) brings over 12 years of clinical experience in psychiatry to her work at Abhasa Rehab and Wellness.
Dr. Shree Aarthi
MBBS, MD, DNB(Psychiatry) brings over 12 years of clinical experience in psychiatry to her work at Abhasa Rehab and Wellness.
- Last Medically Reviewed: 2026-09-23
- Published: 2026-09-23
- Last Updated: 2026-09-23
- 15 min read
Key Takeaways
- Schizophrenia is a recognised medical condition, not a personal failing or a "split personality." It is diagnosed using specific clinical criteria, not guesswork.
- It affects about 1 in 300 people globally and roughly 1 in 240 adults in India at any given time.[1]
- Symptoms fall into three groups: positive (hallucinations, delusions), negative (withdrawal, low motivation), and cognitive (memory, concentration).
- The World Health Organization states that at least one in three people with schizophrenia go on to fully recover, and a range of effective treatments exists.
- Treatment usually combines antipsychotic medication with therapy and family support. It works best when it starts early and continues consistently.
QUICK ANSWER
What is schizophrenia? Schizophrenia is a long-term mental health condition that changes how a person perceives reality, organises their thoughts, and relates to the people around them.
The World Health Organization estimates that 1 in 300 people worldwide, or about 27 million people, live with schizophrenia[1]. In India, a nationwide government survey found that 0.42% of adults currently live with a schizophrenia spectrum disorder.
About 1.41% will have one at some point in their life.[2]
Here’s what makes schizophrenia hard for families to name at first. Nothing about it looks like the scary picture films and headlines often show. What usually happens is quieter.
A young adult starts sleeping oddly, pulls back from friends, says things that seem a little “off.” By the time hallucinations or delusions are clear, that quiet change has often been going on for a while.
This page walks through what schizophrenia is in plain, clinical terms, how it’s recognised, why it develops, how doctors diagnose it, and which treatments actually have evidence behind them.
What Is Schizophrenia?
Schizophrenia is classified by the World Health Organization’s International Classification of Diseases and the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5-TR), as a psychotic disorder – meaning it involves periods where a person loses touch with what is and isn’t real[5][1].
That loss of touch with reality can show up in different ways. A person might hear voices that aren’t there. They might hold beliefs that don’t match the evidence around them. Or they might think and speak in ways that are hard for others to follow.
It is not the same thing as having multiple personalities. That is a different, much rarer condition, and confusing the two is a common misunderstanding.
Two things are worth saying plainly here. First, this is a diagnosable health condition with clear clinical criteria. It is not a judgement about someone’s character or upbringing.
Second, schizophrenia looks different in every person who has it. Some people have mostly hallucinations and delusions. Others struggle more with motivation and withdrawal. No two cases play out the same way.
You can read more about how conditions like this fit into our approach on our what we treat page.
How Common Is Schizophrenia?
In India, the National Mental Health Survey looked at 34,802 adults across 12 states. Led by NIMHANS, it found a current prevalence of 0.42% and a lifetime prevalence of 1.41% for schizophrenia spectrum disorders. It also found that schizophrenia accounts for about 10% of all disability-adjusted life years lost to mental illness in India.
The treatment gap – the share of people who need care but aren’t receiving it – was 72% overall. That gap rose to 83.3% in smaller urban areas[2].
The same survey also found real variation across the country. Current prevalence was highest in large metro cities (0.66%) and somewhat lower in rural areas (0.37%) and smaller towns (0.36%).
The survey found men had a slightly higher lifetime prevalence than women (1.49% versus 1.33%). Eastern states reported the highest rates in the country, while northern states reported the lowest.
Globally, the World Health Organization (WHO) estimates that 1 in 300 people (27 million people) live with schizophrenia, rising to about 1 in 206 people (0.49%) among adults over 20. On average, people with schizophrenia die nine years earlier than the general population – largely from preventable physical health conditions, not from the illness itself.
Alongside that, the same WHO data is genuinely hopeful: at least one in three people with schizophrenia go on to fully recover[1].
"0.42% of Indian adults live with a schizophrenia spectrum disorder today — and 72% of them aren't receiving care for it. That treatment gap, not the condition itself, is the more urgent number."
- National Mental Health Survey of India, Indian Journal of Psychiatry, 2023
The gap between how many people need care and how many receive it is, honestly, the more urgent number here. Most of what makes schizophrenia harder than it needs to be isn’t the condition itself. It’s how long it takes families to find the right support.
Symptoms of Schizophrenia
QUICK ANSWER
What are the symptoms of schizophrenia? Symptoms of schizophrenia fall into three groups: positive symptoms (hallucinations, delusions, disorganised speech), negative symptoms (withdrawal, reduced motivation, flattened emotion), and cognitive symptoms (trouble concentrating, remembering, or making decisions).
Most people experience some combination of all three, not just one[3].
Our article on symptoms of schizophrenia goes deeper into how these show up day to day.
Early Warning Signs
Gradual changes in thinking, mood, and social functioning often appear well before a first full episode of psychosis[4]. Families frequently describe this period in hindsight as “something felt different, but we couldn’t say what.”
Common early signs include: withdrawing from friends and usual activities. A drop in performance at school or work. Unusual or intense new beliefs. Trouble sleeping. Flattening of emotional expression. And a growing difficulty following or joining conversations.
None of these on their own means someone has schizophrenia. Most people who show one or two of these signs do not go on to develop it. But together, lasting for weeks rather than days, they are worth taking seriously and discussing with a professional.
Our article on early signs of schizophrenia walks through this stage in more detail, including how it tends to differ from ordinary teenage or young-adult moodiness.
What Causes Schizophrenia?
Schizophrenia doesn’t have one single cause. Research points to a combination of genetic vulnerability, brain development, and environmental factors that together raise a person’s risk[3][4].
One thing is worth saying clearly. Schizophrenia is not caused by bad parenting, a weak will, or anything a family did wrong. That old belief was common decades ago. Research has since set it aside.
Schizophrenia can also occur alongside substance use, and the two can make each other harder to treat if they aren’t addressed together. Our dual diagnosis page explains how co-occurring conditions are managed as one connected picture rather than two separate problems.
How Is Schizophrenia Diagnosed?
There is no blood test or brain scan that diagnoses schizophrenia on its own. Diagnosis is made by a psychiatrist through clinical evaluation, based on criteria set out in the DSM-5-TR.[5]
To meet the criteria, a person must show two or more of the following for a significant portion of at least one month (or a shorter period if treatment begins), and at least one must be delusions, hallucinations, or disorganised speech:
- Delusions.
- Hallucinations.
- Disorganised speech.
- Grossly disorganised or catatonic behaviour.
- Negative symptoms, such as reduced emotional expression or loss of motivation.
Alongside this, there must be a significant decline in functioning – at work, in relationships, or in self-care since symptoms began. Continuous signs of the disturbance must also persist for at least six months. That includes at least one month of the active symptoms above.
A crucial diagnostic step is ruling out other conditions. Schizoaffective disorder, major depression with psychotic features, and bipolar disorder with psychotic features must all be considered and excluded. Psychotic symptoms can appear in all of them.
The distinction often comes down to timing. If psychotic symptoms only occur during mood episodes, a mood disorder diagnosis takes precedence over schizophrenia[5].
This is exactly why self-diagnosis from a list of symptoms is not reliable. It’s also why an accurate diagnosis matters so much for choosing the right treatment. If you’re trying to understand whether what you’re seeing fits this picture or a related one, our pages on schizoaffective disorder and bipolar disorder explain how those conditions differ.
Our do I need rehab page is a gentler place to start if you’re simply trying to work out next steps.
Types of Schizophrenia: Then and Now
Older classifications used to split schizophrenia into named subtypes. Current diagnostic practice has moved away from that approach in favour of describing symptom severity directly.[5]
| Former DSM-IV Subtype | What It Described | Current DSM-5-TR Approach |
|---|---|---|
|
Former DSM-IV Subtype
Paranoid type
|
What It Described
Dominant delusions and hallucinations, with relatively preserved thinking and behaviour.
|
Current DSM-5-TR Approach
No longer a separate category. Described through symptom presence and severity instead.
|
|
Former DSM-IV Subtype
Disorganised type
|
What It Described
Disorganised speech and behaviour, along with flat or inappropriate emotional expression.
|
Current DSM-5-TR Approach
Same as above.
|
|
Former DSM-IV Subtype
Catatonic type
|
What It Described
Marked disturbances in movement, from rigidity to extreme agitation.
|
Current DSM-5-TR Approach
Retained as a "catatonia" specifier. It can be added to a schizophrenia diagnosis, rather than standing as a subtype of its own.
|
|
Former DSM-IV Subtype
Undifferentiated type
|
What It Described
Symptoms that didn't clearly fit the other categories.
|
Current DSM-5-TR Approach
Removed. DSM-5-TR treats schizophrenia as one diagnosis assessed along a spectrum.
|
|
Former DSM-IV Subtype
Residual type
|
What It Described
Milder, ongoing symptoms after an acute episode had passed.
|
Current DSM-5-TR Approach
Now described using course specifiers, such as "in partial remission," rather than a separate subtype.
|
Why the change? The old subtypes weren’t very stable – the same person could shift between them over time. And they didn’t reliably show which treatment would help most. Naming the symptoms directly, and how bad they are right now, gives doctors a more useful picture.
How Is Schizophrenia Treated?
QUICK ANSWER
Can schizophrenia be treated? Yes. Schizophrenia is a treatable condition, though not currently a curable one in the sense of being permanently eliminated. Treatment combines antipsychotic medication with psychosocial therapy and family support, and it works best when started early and continued consistently[7].
The evidence, strongest first
Antipsychotic medication. This is the foundation of treatment. A large meta-analysis comparing 15 antipsychotic drugs found they were consistently more effective than placebo for reducing hallucinations and delusions.
They do differ from each other, though, in effectiveness and side-effect profile[6]. Long-acting injectable formulations are given every few weeks rather than daily. They have been shown to improve medication adherence and cut relapse by roughly 30–40% compared with daily pills.
That matters, because missed doses are one of the most common reasons symptoms return[8].
Antipsychotics do carry side effects, and these vary between individual medications. A systematic review and network meta-analysis of 18 antipsychotics found that weight gain and metabolic changes were among the most common concerns.
These changes include raised blood sugar and cholesterol, and some medications carry a noticeably higher burden than others[9]. This is exactly why medication choice should stay an ongoing conversation with a psychiatrist, not a one-time decision.
Cognitive behavioural therapy for psychosis (CBTp). The UK’s National Institute for Health and Care Excellence recommends CBTp for all people with schizophrenia. A meta-analysis found it produces moderate improvements in overall symptoms.
The benefits are larger for the distress that symptoms cause and for day-to-day functioning[10][11]. It has also shown promise for people whose symptoms persist despite adequate medication[12].
Family psychoeducation and family therapy. This is one of the most well-established psychosocial treatments for schizophrenia. A Cochrane review found that family-based interventions cut relapse rates by roughly 20–50% compared with standard care alone. Those benefits were still visible one to two years later[13][14].
Social-skills training. Structured training in day-to-day and social skills has been shown to meaningfully improve independent living skills and quality of life. Research suggests these gains carry over into real-world settings, not just the training sessions[15][16].
What treatment actually looks like, step by step
A psychiatric evaluation covering symptom history, severity, physical health, and any co-occurring conditions such as substance use. This determines the right level of care.
A long-term plan for medication continuity, regular follow-up, and support for work, study, or independent living.
You can read about the therapies we use on our schools of therapy page and our how we treat overview.
If you’re specifically exploring care for schizophrenia, our schizophrenia care in Tamil Nadu and schizophrenia care near Mumbai pages describe what our residential programme involves.
Living With Schizophrenia: Support for Patients and Families
A schizophrenia diagnosis is not an endpoint. With consistent treatment, many people manage their symptoms, hold jobs, maintain relationships, and live independently.
Recovery doesn’t always mean symptoms disappear completely – for many people, it means they become manageable enough that the person’s own life, not the illness, is back in the driver’s seat.
Family involvement changes outcomes. Teaching families about the condition is one of the most evidence-backed treatments for schizophrenia there is. Families aren’t bystanders in recovery. They are part of the treatment itself. That said, caring for a loved one with schizophrenia is genuinely hard, and caregivers need support too, not just facts.
A few practical steps tend to help. Learn about the condition together, rather than researching alone. Agree on a plan for what to do if symptoms worsen. Stay involved in medication routines, without taking over completely. And protect some space for the caregiver’s own rest and wellbeing.
Our family support page describes how we involve families throughout treatment, and our life after rehab page covers what ongoing life looks like after a structured treatment programme.
When Should You Seek Help?
If you’re noticing several of the early warning signs described above, and they’ve lasted for more than a couple of weeks, it’s worth speaking to a mental health professional. Not because something is definitely wrong. Simply because an early conversation costs very little, and delay can cost a great deal.
Seek help urgently if someone is at risk of harming themselves or others, is unable to care for their basic needs, or is experiencing a severe break from reality. In those situations, please use the crisis resources below rather than waiting for a scheduled appointment.
For everything short of a crisis, our do I need rehab page is a calm, low-pressure place to start working out what kind of help might fit.
Frequently Asked Questions
Schizophrenia is a long-term mental health condition that affects how a person thinks, perceives reality, and relates to others. It can involve hallucinations, delusions, disorganised thinking, reduced motivation, and difficulty concentrating. It is a medical condition with clear diagnostic criteria, not a character flaw.
No. This is one of the most common misconceptions about schizophrenia. Schizophrenia involves a disconnect from reality, such as hallucinations or delusions – it does not involve separate, distinct personalities. Dissociative identity disorder, sometimes called “split personality,” is a different and much rarer condition.
Genetics play a role, but no single gene causes schizophrenia. Many genes appear to each contribute a small amount of risk, and environmental factors interact with that genetic vulnerability. Having a family member with schizophrenia raises the odds without making the condition certain.
Early signs often include social withdrawal, a drop in performance at school or work, unusual new beliefs, disrupted sleep, and flattened emotional expression, typically appearing gradually in the months before a first full psychotic episode.
A psychiatrist diagnoses schizophrenia through clinical evaluation against DSM-5-TR criteria. This means at least two characteristic symptoms – delusions, hallucinations, disorganised speech, disorganised behaviour, or negative symptoms – for a significant portion of one month.
It also means a functional decline, and continuous signs lasting at least six months. Other conditions, such as schizoaffective or bipolar disorder, must be ruled out first.
Schizoaffective disorder involves the psychotic symptoms of schizophrenia alongside a significant mood episode (depression or mania) that occurs during a substantial part of the illness.
In schizophrenia, mood episodes are either absent or brief relative to the psychotic symptoms. Our schizoaffective disorder page explains this distinction in more detail.
Not in the sense of being permanently eliminated, but it is very treatable. The World Health Organization notes that at least one in three people with schizophrenia go on to fully recover, and many more achieve significant symptom control with consistent treatment.
Antipsychotic medications are the primary treatment and are effective at reducing hallucinations and delusions. They do carry side effects, which vary by drug – weight gain and metabolic changes such as raised blood sugar or cholesterol are among the most common concerns with certain options, while others carry a lower metabolic burden. This is why medication is chosen and monitored individually by a psychiatrist.
Most people with schizophrenia are not violent. A large systematic review and meta-analysis found that any increase in violence risk is concentrated mainly among people with co-occurring substance misuse.
The odds of violence were far higher when substance use was also present than when it was not[7]. Schizophrenia on its own – treated, and without substance misuse – is not a strong predictor of violent behaviour.
Learning about the condition together, staying involved in treatment and medication routines without taking over, watching for early signs of relapse, and protecting the caregiver’s own wellbeing all help.
Family psychoeducation is itself one of the most evidence-backed treatments for schizophrenia, so family involvement isn’t just supportive – it measurably improves outcomes.
Taking the Next Step
If you’ve read this far, you’re probably not just curious. Something has been sitting with you, or with someone you love, for a while now.
Here’s what the evidence supports. Schizophrenia is a recognised medical condition with clear diagnostic criteria, known risk factors, and treatments that have been tested and shown to work.
Medication, therapy, and family support together give people a real path toward stability, and for many, full recovery. Starting treatment earlier tends to lead to better outcomes than waiting.
None of that requires a crisis first. An assessment is simply a conversation with a psychiatrist about what’s actually happening, and it commits you to nothing beyond that first conversation.
You can reach us through our contact page whenever you’re ready to ask a question, and our admission guide sets out what the process involves, step by step, before you decide anything.
Talk to Abhasa’s clinical team confidentially.
Call+91-73736-44444 or Email info@abhasa.in. Our compassionate team understands what you’re going through.
Continue Learning
- Symptoms of schizophrenia - a closer look at how symptoms show up day to day.
- Schizophrenia treatment: medicines, therapy and what recovery looks like
- Schizophrenia Treatment Cost in India
- Early signs of schizophrenia - what to watch for before a first episode.
- Schizophrenia Treatment in Mumbai
- Schizophrenia Rehabilitation in Tamil Nadu (Coimbatore)
- Dual diagnosis - when schizophrenia occurs alongside substance use.
- How We Treat
- Life After Rehab
About the Author
Written by: Abhasa Rehab and Wellness Clinical Content Team.
Medically reviewed by: Dr. Shree Aarthi, MBBS, MD, DNB, Consultant Psychiatrist (12+ years, mental health and substance use disorders)
Based on evidence from peer-reviewed sources and international health authorities listed below.
References
[1] World Health Organization. Schizophrenia. Fact sheet, 2026. https://www.who.int/news-room/fact-sheets/detail/schizophrenia.
[2] National Mental Health Survey of India. Schizophrenia spectrum disorders in India: A population-based study. Indian Journal of Psychiatry, 2023;65(12):1223-1229. PMID 38298877. https://pmc.ncbi.nlm.nih.gov/articles/PMC10826875/
[3] National Institute of Mental Health. Schizophrenia: Symptoms, Causes, and Treatments. NIH. https://www.nimh.nih.gov/health/publications/schizophrenia.
[4] National Institute of Mental Health. Schizophrenia (topic overview). NIH. https://www.nimh.nih.gov/health/topics/schizophrenia.
[5] Schizophrenia. StatPearls, National Center for Biotechnology Information, National Library of Medicine. https://www.ncbi.nlm.nih.gov/books/NBK539864/
[6] Leucht S, et al. Comparative efficacy and tolerability of 15 antipsychotic drugs in schizophrenia: a multiple-treatments meta-analysis. The Lancet, 2013;382(9896):951-962.
[7] American Psychiatric Association. Practice Guideline for the Treatment of Patients With Schizophrenia, Third Edition, 2020.
[8] Kishimoto T, et al. Long-acting injectable vs oral antipsychotics for relapse prevention in schizophrenia: a meta-analysis of randomized trials. Schizophr Bull. 2014;40(1):192-213. PMID 23256986. https://pubmed.ncbi.nlm.nih.gov/23256986/
[9] Comparative effects of 18 antipsychotics on metabolic function in patients with schizophrenia: a systematic review and network meta-analysis. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7029416/
[10] National Institute for Health and Care Excellence. Psychosis and schizophrenia in adults: prevention and management. NICE guideline [CG178], 2014.
[11] Jauhar S, et al. Cognitive-behavioural therapy for the symptoms of schizophrenia: systematic review and meta-analysis with examination of potential bias. Br J Psychiatry. 2014;204(1):20-29. PMID 24385461. https://pubmed.ncbi.nlm.nih.gov/24385461/
[12] Morrison AP, et al. Cognitive therapy for people with schizophrenia spectrum disorders not taking antipsychotic drugs: a single-blind randomised controlled trial. The Lancet, 2014;383(9926):1395-1403. PMID 24508320.
[13] Pharoah F, et al. Family intervention for schizophrenia. Cochrane Database Syst Rev. 2010; (12):CD000088. PMID 21154340. https://pubmed.ncbi.nlm.nih.gov/21154340/
[14] Bird V, et al. Early intervention services, cognitive-behavioural therapy and family intervention in early psychosis: systematic review. British Journal of Psychiatry, 2010;197(5):350-356.
[15] Kurtz MM, Mueser KT. A meta-analysis of controlled research on social skills training for schizophrenia. Journal of Consulting and Clinical Psychology, 2008;76(3):491-504. PMID 18540742.
[16] Bellack AS, et al. A randomized clinical trial of a new behavioral treatment for drug abuse in people with severe and persistent mental illness. Archives of General Psychiatry, 2006;63(4):426-432.
[17] Fazel S, et al. Schizophrenia and violence: systematic review and meta-analysis. PLoS Medicine, 2009. https://pubmed.ncbi.nlm.nih.gov/19668362/
- Medically Reviewed by
- Senior Consultant Psychiatrist
- Abhasa Rehab and Wellness
Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult qualified healthcare professionals for medical concerns. Individual outcomes vary based on multiple factors including treatment adherence, symptom severity, and co-occurring conditions.
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