Schizophrenia Symptoms

Quick Glance: Common Schizophrenia Symptoms

Common schizophrenia symptoms can affect perception, thinking, emotions, motivation and everyday functioning. They may include:

• Hearing, seeing or sensing things that are not there

• Having fixed beliefs that are not supported by evidence

• Speech or thoughts become difficult to follow

• Becoming unusually suspicious or feeling that others intend to cause harm

• Losing motivation or interest in everyday activities

• Withdrawing from friends, family or social activities

• Showing less emotion through speech, facial expression or behaviour

• Having difficulty with attention, memory, problem-solving or decision-making

Schizophrenia Symptoms That Should Not Be Ignored

One unusual thought or a brief period of poor concentration does not necessarily indicate schizophrenia. However, a persistent or marked change in thinking, behaviour or everyday functioning should be assessed by a healthcare professional.

The table below explains schizophrenia symptoms that may need medical assessment and what they may indicate:

These symptoms can also occur with other mental health, substance-related or medical conditions. Therefore, they should not be used to self-diagnose schizophrenia.

Why Do Schizophrenia Symptoms Occur?

Schizophrenia affects how the brain processes perception, thoughts, emotions and information. The exact biological mechanisms are not fully understood. However, research suggests that a combination of genetic, environmental and other factors may influence how schizophrenia develops.

Changes in how the brain processes information can contribute to hallucinations, in which a person hears, sees, smells, tastes, or feels something without an external source. These experiences can feel completely real to the person experiencing them. Schizophrenia can also affect how information and events are interpreted, which may contribute to delusions, where a person holds a fixed belief despite evidence that does not support it.

Thought organisation can also be affected. Ideas may become difficult to connect, causing speech to become jumbled, irrelevant or difficult for another person to follow. Other changes can affect motivation, emotional expression, attention and memory, making everyday activities and social interaction more difficult.

Schizophrenia Symptoms That Require Immediate Medical Attention

Most schizophrenia symptoms do not automatically require emergency care. However, urgent medical or mental health support is needed when symptoms create an immediate risk to the person's safety or physical health.

Seek immediate help if a person with schizophrenia:

• Has suicidal thoughts, intends to seriously harm themselves or has attempted suicide

• Is responding to voices telling them to harm themselves or another person

• Cannot keep themselves safe because of severe psychosis or extreme confusion

• Becomes so distressed, confused or agitated that they cannot manage their behaviour safely

• Cannot maintain essential food or fluid intake because of their symptoms

• Is unable to manage basic self-care, and their physical health is at risk

• Becomes severely unresponsive, stops moving or develops other serious changes in movement or responsiveness

Schizophrenia should not be equated with violence. Most people who experience psychotic episodes are not a danger to others, and the need for emergency care depends on the immediate risk to the person or those around them.

Symptoms of Schizophrenia in Children

Schizophrenia in children is uncommon, particularly before puberty. Early symptoms can overlap with developmental, mental health or medical conditions. Therefore, a noticeable change in the child's usual behaviour or functioning is more important than one unusual behaviour on its own.

Possible symptoms of schizophrenia in children include:

• Hearing or seeing things that other people do not

• Developing unusual or strongly held beliefs

• Finding it difficult to distinguish experiences from reality

• Speaking in a confused or difficult-to-follow way

• Becoming unusually suspicious or fearful

• A noticeable decline in school performance

• Withdrawing from friends or usual activities

• Paying less attention to personal hygiene or other daily routines

In children and young adolescents, it can be difficult to distinguish hallucinations or unusual beliefs from age-related experiences, imagination or other developmental conditions. Persistent or significant changes need assessment by an appropriate healthcare professional rather than being judged from one behaviour alone.

Can You Have Schizophrenia Without Symptoms?

Schizophrenia can have periods when symptoms become much less noticeable. Some people experience episodes in which hallucinations, delusions or disorganised thinking become more prominent, followed by periods with few or no noticeable symptoms.

However, difficulties with motivation, emotional expression, attention, memory or problem-solving may continue for some people even when obvious psychotic symptoms have improved.

The course of schizophrenia varies, with some people experiencing repeated periods of worsening and improvement and others having more persistent difficulties.

When Can Schizophrenia Symptoms Become Life-Threatening?

Schizophrenia symptoms can become life-threatening when they create an immediate risk of serious harm or prevent a person from meeting essential physical needs. The table below explains the serious situations that can make schizophrenia symptoms dangerous and why they require urgent attention:

How are Schizophrenia Symptoms Diagnosed?

There is no single blood test or brain scan that confirms schizophrenia. Diagnosis involves a specialist assessment of the person's symptoms, their duration, changes in behaviour and functioning, and possible alternative explanations.

The table below explains the main assessments that may be used when evaluating symptoms of schizophrenia:

A specialist may also consider other conditions that can cause psychotic symptoms, including bipolar disorder, schizoaffective disorder, substance-related conditions and some medical disorders. A broader assessment helps distinguish schizophrenia from these possible causes.