A Closer Look at Mental Health · Booklet 19
Psychosis
When the perception of reality shifts, early help can meaningfully strengthen the path to recovery.
This booklet presents psychosis not as a frightening label but as a cluster of symptoms that can appear across many different mental and physical conditions. The aim is to explain hallucinations, delusions, and difficulties in assessing reality without stigma.
Psychosis is not a diagnosis on its own but a cluster of symptoms that can appear in many different conditions. Early assessment and appropriate treatment can meaningfully improve long-term outcomes.
What psychosis is
Psychosis is a condition in which there are marked changes in the way a person assesses reality. The two most commonly discussed symptoms are hallucinations and delusions. A hallucination means hearing, seeing, feeling, smelling, or tasting something when there is no corresponding stimulus in the outside world. One of the most frequent examples is hearing voices. A delusion is a fixed false belief that is inconsistent with reality and does not change easily through reasoned discussion. A person may hold with certainty that they are being followed, that their thoughts are being controlled, that they possess special powers, that they have been poisoned, or that they are guilty of something.
Psychosis is not a diagnosis on its own but a cluster of symptoms that can appear in many different conditions. Schizophrenia, bipolar disorder, severe depression, substance use, substance withdrawal, and certain neurological and physical illnesses can all occur alongside psychosis.
Understanding without stigma
Psychosis can seem frightening, but it can accompany many clinical conditions that are treatable and manageable. Early assessment is decisive.
How the symptoms appear
In hallucinations a person may hear voices, see images, or perceive bodily sensations differently. Voices can sometimes be commentary, accusatory, commanding, or threatening. These experiences can feel extremely real and intense to the person.
In delusions a person holds a false belief with a high degree of certainty. Beliefs such as "They are watching me," "The message on the television was sent to me," "My thoughts are being stolen," or "I have been chosen for a great mission" can appear. The content can sometimes align with the person's mood. Grandiosity in mania, and delusions of guilt and worthlessness in depression, are examples of this.
Speech and behavior can also change in psychosis. The connection between sentences may break down, the person may act in ways that those around them cannot make sense of, and daily functioning can be disrupted. On the schizophrenia spectrum, negative symptoms, meaning low motivation, reduced emotional expression, social withdrawal, and an inability to experience pleasure, can also be present.
What causes it
The biological and environmental factors in psychosis need to be considered together. Genetic predisposition, brain development, risks before and during birth, early life stresses, intense psychological strain, sleep deprivation, substance use, and social stressors can all influence risk.
The stress-vulnerability model is used to explain this. Some people may have a higher biological vulnerability to psychosis. These individuals may experience symptoms at lower levels of stress. In people with lower vulnerability, very severe biological or psychological stressors can trigger similar symptoms.
Alcohol withdrawal, stimulant substances, cannabis, certain hallucinogens, high fever, severe sleep deprivation, sensory deprivation, neurological illnesses, and some metabolic conditions can also produce psychosis-like symptoms. For this reason it is important to rule out medical causes at the initial assessment.
When urgent assessment is needed
If the person thinks they may harm themselves or someone else, if voices are giving commands, if there is intense fear and a break from reality, if they are unable to maintain basic self-care, or if there is severe sleep deprivation and agitation, urgent psychiatric assessment is needed.
Early intervention in a first psychotic episode is especially important. The earlier the symptoms are recognized and appropriate treatment begins, the better the long-term outcomes for functioning can be. For this reason it can be risky for families to wait hoping it will pass, or to explain the symptoms only through moral, religious, or personality-based frameworks.
Trying to argue someone out of their beliefs during a psychotic episode rarely works. A more helpful approach is to acknowledge that the experience feels real and frightening to the person, to ensure safety, and to direct them toward professional help.
A first sentence for loved ones: "I can see that this feels very real and frightening to you. I am not here to argue with you. What matters right now is that we stay safe and get support from a professional."
Treatment options
Antipsychotic medications are among the primary biological treatments for psychosis. The treatment plan is organized by a psychiatrist according to the diagnosis, the severity of symptoms, the person's age, accompanying physical illnesses, substance use, and previous treatment responses.
Psychological treatments are also important. Cognitive behavioral therapy for psychosis, stress management, problem solving, sleep regulation, reducing substance use, insight work, coping skills for voices, and family interventions can all contribute to treatment.
Informing families, supporting medication adherence, recognizing early warning signs, supporting social functioning, and reducing stigma are important parts of treatment. Psychosis should be approached both as a moment of crisis and as a process of recovery and rebuilding life.
When to consider professional support
If voices, images, or strong beliefs out of keeping with reality are present, a professional evaluation is important.
If the person carries a risk of harming themselves or someone else, urgent psychiatric help is needed.
If the symptoms occur alongside substance use, severe sleep deprivation, mania, or depression, a comprehensive assessment should be carried out.
If the person's functioning at work, school, in relationships, or in basic self-care is disrupted, support should not be delayed.
If symptoms of this kind are being experienced for the first time, urgent or rapid psychiatric assessment is required.
Questions to ask yourself
- Is what I am experiencing at the level of sound, image, thought, or belief?
- How real does this experience feel to me, and how is it affecting my behavior?
- Have my sleep, substance use, stress levels, or physical health changed during this period?
- What is my family or someone I trust noticing in my symptoms?
- What might be a first step that would make it easier for me to seek a professional assessment?
Source note
This booklet is an original psychoeducational text. Its clinical frame is kept consistent with the sources below.
- NICE CG178. Psychosis and schizophrenia in adults, prevention and management, last reviewed 2025.
- NICE QS80. Psychosis and schizophrenia in adults quality standard, quality statement 2: cognitive behavioural therapy.
- MSD Manual Professional. Introduction to schizophrenia and related disorders.
- World Health Organization. ICD-11, schizophrenia or other primary psychotic disorders.