What Is Psychosis? Symptoms, Early Signs and Treatment

Understanding Psychosis

Psychosis is a mental state in which a person loses some contact with shared reality. Their perceptions, thoughts or beliefs change in ways that make it hard to tell what is real, most often through hallucinations (such as hearing voices), delusions (firmly held beliefs that others do not share and that do not change with evidence) and disorganized thinking. Psychosis is not a diagnosis in itself but a group of symptoms that can occur in several conditions, including schizophrenia, bipolar disorder and severe depression.

Psychosis can be frightening and confusing, both for the person experiencing it and for the people around them. It is also treatable, and many people recover well, particularly when they get help early.

Prevalence and impact

The U.S. National Institute of Mental Health (NIMH) estimates that about 3 in 100 people will experience psychosis at some point in their lives, and that roughly 100,000 young people in the United States experience a first episode each year. First episodes most commonly occur between the late teens and early thirties, with onset tending to be somewhat earlier in men than in women. Psychosis can, however, occur at any age, including in later life, when it is more often linked to medical conditions or dementia.

Common misconceptions

Several myths make psychosis harder to talk about. The idea that people with psychosis are typically dangerous is not supported by evidence: most are not violent, and people with severe mental illness are more likely to be victims of violence than perpetrators. Psychosis is also not the same as "split personality", a term often confused with dissociative identity disorder. Nor is psychosis always permanent, and it does not always mean schizophrenia. Our page on mental health myths explores similar misunderstandings.

The continuum of psychotic experiences

Research increasingly shows that psychotic-like experiences exist on a continuum in the general population. A 2009 meta-analysis by Jim van Os and colleagues found that a small but meaningful proportion of people report experiences such as hearing a voice or holding unusual beliefs without ever developing a psychotic disorder. Severe sleep deprivation, extreme stress, bereavement and some substances can all trigger brief psychotic-like experiences. What distinguishes clinical psychosis is that experiences are persistent, distressing, believed with conviction and interfere with life.

Symptoms and Experiences

The descriptions below explain the symptoms clinicians look for. They are for understanding, not self-diagnosis; many of these experiences have other explanations, and only a professional assessment can clarify what is going on.

Hallucinations

Hallucinations are perceptions that occur without an external source but feel completely real. Auditory hallucinations are the most common: people may hear one or more voices commenting on their actions, talking to each other, or giving commands, or hear sounds and music. Voices may be experienced as coming from inside or outside the head and can be hostile, neutral or occasionally comforting. Less commonly, hallucinations can be visual (seeing people, shapes or movement), tactile (feeling touched or sensations on the skin), olfactory (smells) or gustatory (tastes). Prominent visual, smell or taste hallucinations often prompt clinicians to look carefully for medical or substance-related causes.

Delusions

Delusions are fixed beliefs that are held with strong conviction despite clear evidence against them and are not explained by the person's culture or religion. Common themes include:

• Persecutory: believing one is being watched, followed, harmed or conspired against. This is the most common type.
• Referential: believing that ordinary events, gestures or media are directed at oneself.
• Grandiose: believing one has special powers, wealth, identity or a special mission.
• Somatic: beliefs about the body, such as that an organ is diseased or missing, despite reassurance.
• Passivity or control experiences: believing that thoughts are being inserted, removed or broadcast, or that one's actions are controlled by an outside force.

Delusions can be distinguished from strongly held but ordinary beliefs by how fixed they are, how unusual they are within the person's culture, and how much they affect behavior. Our page on delusional disorder discusses delusions in more depth.

Disorganized thinking and speech

Thinking can become hard to follow. A person may jump between loosely connected topics, go off on tangents, stop suddenly mid-sentence (thought blocking), invent words, or in severe cases produce speech that is very difficult to understand. Clinicians usually infer thought disorder from speech.

Disorganized or unusual behavior

Behavior may become unpredictable or hard to understand, with difficulty completing everyday tasks, emotional responses that do not fit the situation, or neglect of self-care. Some people experience catatonia, a state of markedly reduced responsiveness or, less often, excessive purposeless movement.

Negative symptoms

Negative symptoms describe a reduction in normal functions: reduced motivation (avolition), reduced ability to anticipate or feel pleasure (anhedonia), reduced emotional expression, reduced speech, and social withdrawal. They are especially associated with schizophrenia, can be among the most disabling features, and are often mistaken for laziness or depression.

Early Warning Signs

A first episode of psychosis is often preceded by a prodromal phase, a period of subtle change that can last from weeks to several years. These changes are easier to recognise in hindsight than at the time, because many of them are also common in adolescence, stress or depression.

Common prodromal changes

Perceptual changes may include heightened sensitivity to light or sound, seeing shadows or movement at the edge of vision, briefly hearing one's name called, or things looking or sounding different. Cognitive changes can include difficulty concentrating, memory problems and a drop in school or work performance. Mood changes such as anxiety, depression, irritability or emotional flatness are common. Behavioral changes can include social withdrawal, declining self-care, disrupted sleep and increased substance use. People may also develop new or unusual ideas, such as growing suspiciousness, odd beliefs, preoccupation with abstract or mystical topics, or a sense that they or the world have changed.

Clinical high-risk criteria

Researchers in Australia and elsewhere developed criteria to identify young people at "ultra-high risk" or "clinical high risk" of psychosis. These include attenuated psychotic symptoms (milder versions of psychotic experiences), brief limited intermittent psychotic symptoms (full symptoms lasting less than a week and resolving on their own), and genetic risk with functional decline (a close relative with a psychotic disorder, or schizotypal personality, plus a recent drop in functioning). Structured interviews such as the SIPS and CAARMS are used to assess these criteria.

A 2012 meta-analysis by Paolo Fusar-Poli and colleagues found that around 18% of people meeting high-risk criteria developed psychosis within six months, rising to about a third within three years. In other words, most people at clinical high risk do not develop a psychotic disorder, though many have other difficulties that benefit from support.

When to seek help

It is worth seeking an assessment from a doctor or mental health professional when unusual thoughts or perceptions persist, when there is a noticeable decline in functioning, when family or friends are worried about changes, or when the person feels increasingly distressed or confused. Anyone who is having thoughts of harming themselves, or who seems at immediate risk, should get urgent help; see our crisis resources.

First Episode Psychosis

First episode psychosis (FEP) refers to the first time someone experiences psychotic symptoms at a clinical level. It most often occurs in late adolescence or early adulthood and may develop gradually or suddenly. People often feel frightened and confused and may find it hard to explain what is happening; families frequently notice changes in personality or behavior first.

Duration of untreated psychosis

The time between the onset of psychotic symptoms and the start of appropriate treatment is called the duration of untreated psychosis (DUP). In many countries this has historically averaged a year or more. Research consistently associates shorter DUP with better outcomes, which is a major reason for early intervention services. Barriers to early help include stigma, lack of awareness, fear and difficulty accessing services.

Early intervention services

Specialised early intervention services were pioneered in Australia in the 1990s, notably by Patrick McGorry and colleagues, and have since spread to many countries. In the United States, a model known as coordinated specialty care (CSC) was tested in the NIMH-funded RAISE study. In a 2016 trial led by John Kane, people receiving CSC stayed in treatment longer and showed greater improvements in quality of life and symptoms than those receiving usual community care, with the largest benefits for those with a shorter DUP.

These services typically last two to three years and involve a team providing several elements together: careful medical and medication management; individual psychological therapy, often cognitive behavioral therapy for psychosis; family education and support; case management; supported education and employment to help people stay in or return to school and work; and, increasingly, peer support from people with lived experience.

Causes and Risk Factors

There is no single cause of psychosis. Most researchers use a stress-vulnerability model, in which inherited and early-life vulnerabilities interact with later stresses and exposures. Most people with any single risk factor never develop psychosis.

Genetic factors

Psychotic disorders run in families, and the risk is higher the closer the genetic relationship to an affected relative. Large genetic studies show that risk is polygenic, involving many genes each with a small effect, and that genetic risk overlaps across schizophrenia, bipolar disorder and other conditions. Family history increases risk but does not determine outcome.

Brain chemistry and structure

The best-established neurochemical finding involves dopamine: many people with psychosis show increased dopamine activity in certain brain pathways, which may cause ordinary experiences to feel unusually significant ("aberrant salience"). The neurotransmitter glutamate is also implicated. Imaging studies show average differences in brain structure and connectivity in groups of people with psychotic disorders, though these differences are small and cannot be used to diagnose an individual. Research into immune and inflammatory processes is ongoing.

Environmental risk factors

Several environmental factors have been consistently linked with higher risk:

• Pregnancy and birth: maternal infections, severe stress or malnutrition during pregnancy, and obstetric complications. Older paternal age has also been associated with modestly higher risk.
• Childhood adversity: abuse, neglect, bullying and other childhood trauma are associated with increased risk, particularly of hallucinations and paranoid beliefs.
• Social environment: growing up in cities, migration, and experiences of discrimination and social exclusion are linked to higher rates, possibly through chronic social stress.
• Cannabis: frequent use, especially of high-potency products and starting in adolescence, is associated with a higher risk of psychotic disorder. The 2019 EU-GEI study by Marta Di Forti and colleagues estimated that daily use of high-potency cannabis was associated with substantially higher odds of psychotic disorder.
• Other substances: stimulants and hallucinogens can trigger psychotic symptoms. See our overview of addiction.
• Acute stress and sleep loss: major life events and severe sleep deprivation can precipitate episodes in vulnerable people.

Medical causes

Psychosis can also result directly from a medical condition, which is why a physical health assessment is an important part of evaluation. Examples include neurological conditions (such as epilepsy, brain tumours, stroke and dementia), autoimmune conditions affecting the brain (such as autoimmune encephalitis), metabolic and hormonal problems (such as thyroid disease), certain infections, and some prescribed medicines. Delirium, an acute state of confusion often caused by illness, can include hallucinations and is a medical emergency.

Protective factors

Factors associated with lower risk or better outcomes include strong social support, a stable environment, good functioning before illness, avoiding cannabis and other drugs, and early access to help.

Types of Psychotic Disorders

The DSM-5-TR describes several conditions in which psychosis is a central or possible feature. Duration and the presence of mood symptoms are key distinctions.

Psychosis after childbirth (postpartum psychosis) is rare but is considered a psychiatric emergency; it is discussed on our postpartum depression page. People with schizotypal personality disorder have milder, longer-lasting unusual experiences without full psychosis.

Treatment Approaches

Treatment is usually most effective when it combines medical, psychological and social support, tailored to the person's needs and preferences.

Medication

Antipsychotic medications are a central part of treatment for many psychotic disorders and have strong evidence for reducing positive symptoms such as hallucinations and delusions and lowering the risk of relapse. They can also cause significant side effects, including weight gain, metabolic changes, movement problems and sedation, which vary between medicines and individuals. Choosing, adjusting or stopping medication is a decision for the person and their psychiatrist or doctor together, with regular physical health monitoring. Stopping suddenly without medical guidance can increase the risk of relapse.

Cognitive behavioral therapy for psychosis (CBTp)

Cognitive behavioral therapy adapted for psychosis helps people make sense of their experiences, reduce the distress associated with voices or unusual beliefs, examine evidence for and against distressing interpretations, and develop coping strategies. Guidelines in several countries, including the UK's NICE, recommend offering CBTp. Research shows modest average benefits on symptoms and distress, with considerable variation between individuals.

Family intervention

Family interventions provide education about psychosis, improve communication and problem-solving, and reduce stress at home. They have some of the strongest evidence for reducing relapse and hospital admissions. Family members' own wellbeing is also an important focus.

Cognitive remediation and rehabilitation

Cognitive remediation uses structured exercises to improve attention, memory and planning, with benefits most likely when combined with practical rehabilitation. Supported employment approaches such as Individual Placement and Support, which help people find and keep competitive jobs, have strong research support. Supported education, social skills training and help with independent living are also commonly offered.

Crisis support

During acute episodes, people may need crisis teams, home treatment or a period in hospital to stay safe and stabilise. Safety planning, and advance planning about what helps during a crisis, can give people more control over their care. In an emergency, contact emergency services or a crisis line; see crisis resources.

Complementary approaches

Regular exercise has evidence for improving physical health and some symptoms, and helps counter medication-related weight gain. Mindfulness-based approaches adapted for psychosis, and arts therapies, are used in some services. Consistent sleep is important for stability. These complement rather than replace core treatment.

Recovery and Rehabilitation

What recovery means

Recovery can be understood in several ways. Clinical recovery refers to reduction or remission of symptoms. Functional recovery refers to returning to work, study, relationships and independent living. Personal recovery, a concept emphasised by people with lived experience, means building a meaningful and hopeful life, whether or not some symptoms continue.

What research shows

Outcomes after a first episode vary widely. A 2017 meta-analysis of long-term studies by John Lally and colleagues found that around 58% of people with first-episode psychosis achieved symptom remission and around 38% met criteria for broader recovery over follow-up periods averaging several years. Some people have a single episode and never another; others experience recurrent episodes or longer-lasting difficulties. Early intervention, staying engaged with support, avoiding cannabis and other drugs, and strong social support are associated with better outcomes.

The recovery process

Recovery is rarely a straight line. People often describe phases: stabilising and feeling safe; making sense of what happened; rebuilding routines, confidence and relationships; and, over time, pursuing personal goals and sometimes using their experience to help others. Setbacks do not mean failure.

Relapse prevention

Relapse prevention plans typically identify personal early warning signs (such as poor sleep, growing suspiciousness or withdrawal), agree who to contact and what steps to take, and include strategies for managing stress, maintaining routines and avoiding substances. Many people develop these plans with their care team and family.

Support for Individuals and Families

For people experiencing psychosis

Strategies that people commonly find helpful, alongside professional care, include keeping a regular sleep routine, avoiding drugs and alcohol, staying connected with supportive people, engaging in meaningful activities, and learning to notice early warning signs. People who hear voices sometimes find it useful to work with a therapist on understanding and responding to voices, and peer-led approaches such as the Hearing Voices Network offer a space to share experiences. Small, gradual steps, sometimes using behavioral activation, can help with low motivation.

For family members and friends

Supporting someone with psychosis can be challenging. It often helps to learn about psychosis, stay calm and patient, use clear and simple language, and focus on the person's feelings rather than arguing about whether beliefs are true. Directly challenging delusions tends to increase distress, while dismissing them can feel invalidating; acknowledging how frightening an experience must be is usually more helpful. Encouraging, rather than forcing, engagement with services, and noticing small improvements, can support recovery.

Families also need support. Family support groups, education programmes and attention to one's own wellbeing help carers keep going. Our guides on caregiving and how to support someone offer more ideas.

Support organisations

Organisations that provide information and support include the National Alliance on Mental Illness (NAMI) in the United States, the Hearing Voices Network, Mental Health America, and national early psychosis networks. Many countries have dedicated early intervention in psychosis services that accept referrals from doctors and, in some areas, self-referral.

Early Intervention and Prevention

Why early detection matters

Early detection aims to reduce the duration of untreated psychosis, limit disruption to education, work and relationships, and reduce the trauma of a prolonged crisis. Public awareness campaigns, training for teachers and primary care staff, and easy routes into assessment all contribute.

Support for people at clinical high risk

For young people who meet clinical high-risk criteria, services usually offer monitoring, psychological support (often CBT), help with current problems such as anxiety or depression, family support and practical assistance. Research into whether specific interventions prevent transition to psychosis has produced mixed results, and the field continues to debate the best approach. Because most people at high risk do not develop psychosis, care focuses on current needs and avoiding unnecessary stigma.

Broader prevention

Population-level approaches include reducing stigma, supporting good prenatal care, preventing childhood maltreatment and bullying, reducing heavy cannabis use among adolescents, and addressing social adversity. Building general resilience, through social connection, stress management, regular sleep and meaningful activity, supports mental health more broadly.

Hope and Recovery

Psychosis can be frightening and disorienting, but older, pessimistic views have been replaced by evidence that many people recover well, especially with early, comprehensive support. Understanding psychotic experiences as part of a continuum of human experience can reduce stigma and encourage people to seek help sooner.

For people experiencing psychosis and their families, the road can be hard, but it is far from hopeless. Early recognition, prompt assessment by a qualified mental health professional, and sustained support give the best chance of returning to valued roles and building a meaningful life.