Schizophrenia is a serious mental health disorder that affects the way a person perceives reality, thinks, feels and behaves. It belongs to the group of psychotic disorders and can significantly affect personal, family, social, educational and occupational functioning. The onset of schizophrenia most commonly occurs during late adolescence or early adulthood, although it can develop at other ages. The clinical presentation varies considerably from person to person. Some patients experience episodes followed by periods of remission, while others may have more persistent symptoms or functional difficulties. Early diagnosis and treatment of schizophrenia are important. With appropriate medication, psychosocial interventions, family support and regular follow-up, many patients can achieve significant improvement in their symptoms and overall functioning.

Symptoms of Schizophrenia

The symptoms of schizophrenia are not the same for every patient and may change throughout the course of the condition.

They are generally divided into:

• positive or psychotic symptoms
• negative symptoms
• symptoms of disorganisation
• cognitive difficulties

This distinction helps provide a better understanding of the clinical presentation and supports appropriate treatment planning.

Delusions

Delusions are fixed beliefs that do not correspond with reality and persist despite evidence that contradicts them.

For example, a person may believe that:

• other people are watching or following them
• someone is trying to harm them
• particular events or messages are specifically directed at them
• other people can influence or control their thoughts or actions
• they possess special powers, abilities or a particular mission

For the patient, these beliefs may feel completely real and can lead to significant fear, suspiciousness or changes in behaviour.

Hallucinations

Hallucinations are perceptual experiences that occur without a corresponding external stimulus.

They may be:

• auditory
• visual
• tactile
• olfactory
• gustatory

Auditory hallucinations are particularly common in schizophrenia.

For example, a person may hear voices commenting on their actions, talking to each other or speaking directly to them. Hallucinations require careful assessment because they can also occur in other psychiatric, neurological or medical conditions.

Disorganised Thinking and Speech

Schizophrenia can affect the organisation of thought. This may become apparent in the way a person speaks and communicates.

Possible signs include:

• difficulty maintaining a logical sequence during conversation
• abruptly moving from one subject to another
• responses that have little connection to the question being asked
• difficulty organising and expressing thoughts
• in more severe cases, speech that becomes difficult to understand

Disorganisation can also affect a person's ability to organise everyday activities.

Disorganised or Catatonic Behaviour

Some patients may develop significant changes in their behaviour or movement. Behaviour may become markedly disorganised, unpredictable or inappropriate to the situation. Catatonia is a distinct clinical syndrome that may involve a significant reduction in movement and responsiveness, maintenance of unusual postures or, in some cases, marked motor agitation. Catatonia requires prompt medical and psychiatric assessment.

Negative Symptoms of Schizophrenia

Negative symptoms refer to a reduction in functions that would normally be present.

They may include:

• reduced emotional expression
• reduced speech
• decreased initiative and motivation
• loss of interest or pleasure
• social withdrawal
• reduced participation in everyday activities

Negative symptoms can significantly affect daily functioning and, in some patients, may persist even after prominent psychotic symptoms have improved. It is also important to distinguish negative symptoms from depression, medication side effects and other factors that may produce a similar clinical presentation.

Cognitive Difficulties in Schizophrenia

Schizophrenia may also be associated with difficulties in certain cognitive functions.

These may affect:

• attention
• concentration
• working memory
• speed of information processing
• organisation and planning
• problem-solving

Cognitive difficulties may affect a person's ability to work, study, organise daily life or maintain independence.

Early Signs and Changes Before a Psychotic Episode

In some cases, a period of gradual changes may occur before the development of clear psychotic symptoms.

These may include:

• social withdrawal
• decline in performance at work or in education
• difficulty concentrating
• sleep disturbances
• reduced attention to personal hygiene
• loss of interest in previously enjoyed activities
• increasing suspiciousness
• unusual ideas or behaviours
• changes in emotional expression

These signs do not necessarily indicate schizophrenia and can occur in many other mental or physical health conditions. However, when such changes are significant, persistent or accompanied by psychotic symptoms, specialist psychiatric assessment is recommended.

First Episode Psychosis

A first episode of psychosis may involve delusions, hallucinations, disorganised thinking or significant behavioural changes. The presence of psychosis does not automatically mean that a person has schizophrenia. A psychotic episode can occur in the context of several different psychiatric or medical conditions. For this reason, particularly during a first episode, careful assessment is necessary to identify the possible cause and initiate appropriate treatment as early as possible.

Causes and Risk Factors

There is no single cause of schizophrenia. Its development is thought to involve a complex interaction between genetic, neurobiological, developmental and environmental factors.

Factors that may be associated with an increased risk include:

• genetic predisposition
• family history of psychotic disorders
• certain developmental and environmental factors
• psychosocial stress
• use of psychoactive substances in vulnerable individuals

Cannabis use is of particular importance, as frequent and especially heavy use has been associated with an increased risk of psychotic disorders. Having a risk factor does not mean that a person will develop schizophrenia.

Schizophrenia and Substance Use

Substance use is an important part of the assessment of a patient presenting with psychotic symptoms. Certain substances can cause or worsen psychotic symptoms.

Assessment may include the use of:

• cannabis
• amphetamines and methamphetamine
• cocaine
• hallucinogenic substances
• alcohol
• certain medications or other psychoactive substances

The relationship between substance use and psychotic symptoms needs to be carefully evaluated because it can influence both diagnosis and treatment.

Diagnosis of Schizophrenia

There is no single blood test, imaging examination or other individual test that can confirm a diagnosis of schizophrenia. Diagnosis is based on a comprehensive psychiatric assessment, the course of the symptoms and the exclusion of other possible causes.

Assessment may include:

• detailed psychiatric history
• onset and progression of symptoms
• assessment of delusions and hallucinations
• assessment of thinking and behaviour
• evaluation of negative and cognitive symptoms
• assessment of mood
• functioning at work, in education and in relationships
• alcohol, cannabis and other substance use
• medication and medical history
• family psychiatric history
• assessment of the risk of self-harm, suicide or aggressive behaviour

When appropriate, and with respect for confidentiality and consent, information from family members or other people who know the patient well may help establish the timeline and progression of symptoms.

Differential Diagnosis of Psychosis

Psychotic symptoms do not occur exclusively in schizophrenia.

The differential diagnosis may include:

• bipolar disorder with psychotic symptoms
• severe depression with psychotic features
• schizoaffective disorder
• other psychotic disorders
• substance- or medication-induced psychosis
• neurological disorders
• endocrine or metabolic disorders
• infections or autoimmune conditions in selected cases
• delirium
• other medical causes of changes in thinking and behaviour

Depending on the patient's age, medical history, symptoms and examination findings, laboratory tests or other medical investigations may be required. A careful differential diagnosis is particularly important during a first episode of psychosis.

Treatment of Schizophrenia

Treatment of schizophrenia is usually long-term and is individualised according to the patient's symptoms, course of illness, response to treatment, physical health and individual needs. Modern treatment is not limited to reducing psychotic symptoms.

The goals also include:

• preventing relapse
• improving everyday functioning
• promoting independence
• maintaining social relationships
• supporting employment or education
• protecting physical health
• improving quality of life

Treatment may combine antipsychotic medication, psychotherapeutic and family interventions, psychoeducation and psychosocial rehabilitation.

Antipsychotic Medication

Antipsychotic medications are a central component of schizophrenia treatment.

They can help reduce symptoms such as:

• delusions
• hallucinations
• disorganised thinking
• severe psychotic agitation

The choice of medication is individualised and may take into consideration:

• previous response to treatment
• potential side effects
• physical health
• other medications
• patient preferences
• possible difficulties with taking medication consistently

In some cases, long-acting injectable antipsychotics may be used, particularly when this form of treatment better suits the patient's needs or preferences.

Monitoring Physical Health

Treatment of schizophrenia also includes systematic monitoring of physical health. Some antipsychotic medications may affect weight, metabolism, blood glucose, lipid levels, blood pressure or other physical health parameters.

Depending on the treatment and individual risk factors, monitoring may include:

• body weight and body mass index
• waist circumference
• blood pressure
• blood glucose or HbA1c
• lipid profile
• movement-related side effects
• cardiovascular risk factors
• other parameters depending on the specific medication

Physical healthcare is an essential component of long-term schizophrenia management.

Psychotherapy and Cognitive Behavioural Therapy

Psychotherapy does not replace antipsychotic treatment but can be an important part of comprehensive care.

Cognitive Behavioural Therapy (CBT) may help some patients:

• better understand their experiences
• recognise factors that worsen their symptoms
• develop coping strategies
• reduce the distress associated with certain psychotic experiences
• manage anxiety or depressive symptoms
• support everyday functioning

The therapeutic approach is adapted to the patient's condition, abilities and individual goals.

Psychoeducation and Family Involvement

The family can play an important role in supporting a person with schizophrenia.

Psychoeducation helps patients and, when appropriate, their families understand:

• the nature of the disorder
• the role of treatment
• the importance of regular follow-up
• possible side effects of medication
• early signs of relapse
• factors that may worsen the condition
• ways of communicating and providing support more effectively

Family interventions can form an important part of a comprehensive treatment programme.

Psychosocial Rehabilitation and Reintegration

Treatment of schizophrenia is not limited to the reduction of psychotic symptoms. For many patients, restoring everyday functioning is equally important.

Depending on individual needs, support may be required for:

• returning to work or education
• developing social skills
• independent living
• organising daily activities
• managing financial and practical responsibilities
• developing and maintaining social relationships
• addressing social isolation

Treatment therefore focuses not only on symptom control but also on recovery, independence and quality of life.

Relapse Prevention

Preventing further psychotic episodes is an important part of long-term treatment.

The treatment plan may include:

• consistent use of the agreed medication
• regular psychiatric follow-up
• recognition of early signs of deterioration
• maintaining a stable sleep schedule
• avoiding cannabis and other psychoactive substances
• reducing factors that significantly increase stress
• support from family and the social environment
• early contact with the treating psychiatrist when changes occur

An individualised plan for recognising early signs of relapse may allow earlier intervention.

When Immediate Psychiatric Assessment Is Needed

Immediate psychiatric assessment is particularly important when a person develops:

• first onset of severe psychotic symptoms
• severe disorganisation of behaviour
• marked agitation or aggressive behaviour
• suicidal thoughts or behaviour
• risk of harm to themselves or others
• voices giving dangerous commands
• inability to meet basic needs or maintain self-care
• severe catatonia
• sudden and significant deterioration in mental state

In some of these situations, emergency treatment or hospitalisation may be required to ensure the patient's safety and appropriately stabilise their condition.

Individualised Treatment of Schizophrenia

Schizophrenia does not follow the same course in every person. The needs of someone experiencing a first psychotic episode may be very different from those of a patient with recurrent relapses, persistent negative symptoms or treatment-resistant illness. For this reason, management should be individualised, continuous and multidimensional. A comprehensive treatment approach combines, according to the patient's needs, medication, psychotherapy, psychoeducation, family support, physical health monitoring and psychosocial rehabilitation. The aim is not only to reduce psychotic symptoms but also to prevent relapse, promote independence, restore functioning and achieve the best possible quality of life.