Schizophrenia is a mental health condition that can affect a person's perception of reality, thinking, emotions, speech and behaviour. Its presentation and course vary from person to person: symptoms may develop gradually or appear acutely, and periods of exacerbation may be followed by remission.
Main symptoms of schizophrenia
- positive symptoms: hallucinations, delusions, and disorganised thinking or speech;
- negative symptoms: reduced motivation, emotional expression and social engagement;
- cognitive difficulties: problems with attention, memory, planning and decision-making.
A single symptom does not confirm schizophrenia. Similar experiences can occur with other mental or neurological conditions, substance use, or the effects of certain medicines. Diagnosis requires a comprehensive clinical assessment by a psychiatrist.
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Causes and risk factors
Schizophrenia has no single established cause. Its development is associated with a combination of genetic vulnerability, differences in brain development and function, and environmental factors. Stress or substance use may increase the risk of symptoms emerging or worsening in vulnerable people, but neither is a universal cause of the condition.
Course, remission and recovery
Current diagnostic practice focuses on a person's symptoms, their severity and duration, and their effect on everyday life rather than on outdated schizophrenia subtypes. The course may be episodic or persistent. With appropriate treatment, many people achieve lasting remission, study, work and maintain close relationships. According to the World Health Organization, at least one third of people with schizophrenia experience complete remission of symptoms.
When should someone seek help?
Medical assessment is important when a person hears or sees things that others do not, has a persistent belief that they are being persecuted, develops markedly confused thinking, shows a major change in behaviour, or becomes unable to care for themselves. If there is an immediate risk to the person or others, urgent medical help is required.
Treatment of schizophrenia
Treatment is planned individually and may include antipsychotic medication, psychoeducation, psychological support, family interventions, cognitive behavioural therapy and psychosocial rehabilitation. Regular contact with the treating clinician, shared monitoring of benefits and adverse effects, and support with returning to education, work and everyday activities are important parts of care.
Seeking help early improves the opportunities for symptom control and recovery. Treatment should not focus only on ending a psychotic episode: it should also support the person's quality of life, independence and social relationships.