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What is Schizophrenia? Causes, Symptoms, and Treatment.

What is Schizophrenia


What is Schizophrenia?

Schizophrenia is a human mental health disorder characterized by various symptoms, including delusions, hallucinations, disorganized thinking, and abnormal behavior. It affects approximately 1% of the population worldwide and is considered a chronic and disabling condition.

The science behind Schizophrenia?

The science behind Schizophrenia involves a complex interplay of genetic, environmental, and neurological factors. Schizophrenia has a vital genetic component, with heritability estimates ranging from 60-80%. Studies suggest that abnormalities in neurotransmitters such as dopamine, glutamate, and serotonin may be related to Schizophrenia.

Abnormalities in brain structure and function, particularly in the prefrontal cortex, hippocampus, and basal ganglia, may also contribute to the symptoms of Schizophrenia. However, no single gene or brain abnormality has been identified as the definitive cause of Schizophrenia.

What are the different types of Schizophrenia?

There are several types of Schizophrenia, each with its symptoms and characteristics. The different types of Schizophrenia are classified based on the predominant symptoms a person experiences.

Some common types of Schizophrenia are as follows:

Paranoid Schizophrenia:

This type is characterized by delusions and auditory hallucinations centered around a particular theme or belief, such as persecution or grandiosity. People with paranoid Schizophrenia may also exhibit suspicious or paranoid behavior.

Disorganized Schizophrenia:

This type is characterized by disorganized speech, thought, and behavior. People with this Schizophrenia may have difficulty communicating and organizing their ideas and exhibit inappropriate or bizarre behaviors.

Catatonic Schizophrenia:

This Schizophrenia type is characterized by disruptions in movement, including rigidity, immobility, and repetitive motions. People with catatonic Schizophrenia may also exhibit unusual or inappropriate behaviors.

Undifferentiated Schizophrenia:

This type includes a mix of symptoms from the other types of Schizophrenia. People with undifferentiated Schizophrenia may exhibit various symptoms, including delusions, hallucinations, disorganized speech and behavior, and catatonic symptoms.

Residual Schizophrenia:

Residual Schizophrenia is characterized by a history of positive symptoms (such as delusions and hallucinations) that have diminished or disappeared but with ongoing negative symptoms such as social withdrawal, apathy, and decreased emotional expression.

What are the causes of Schizophrenia?

Schizophrenia is a complex disorder believed to be caused by genetic, environmental, and neurological factors. While the exact accurate cause of Schizophrenia is not fully understood, researchers have identified several potential reasons and risk factors that may contribute to the development of the disorder.

Here are some causes and risk factors of Schizophrenia:


Schizophrenia has a vital genetic component, with heritability estimates ranging from 60-80%. Studies have identified several genes that may be involved in the development of Schizophrenia, although no single gene has been identified as a definitive cause.


Schizophrenia may be related to neurotransmitter abnormalities such as dopamine, glutamate, and serotonin. These neurotransmitters regulate mood, cognition, and behavior, and disruptions in their function may contribute to the symptoms of Schizophrenia.

Brain structure and function:

Abnormalities in brain structure and function have been observed in people with Schizophrenia, particularly in the prefrontal cortex, hippocampus, and basal ganglia. These regions are involved in cognitive and emotional processing, and their dysfunction may contribute to the symptoms of Schizophrenia.

Environmental factors:

Several environmental factors have been linked to an increased risk of developing Schizophrenia, including prenatal exposure to infection, stress, trauma, substance abuse, and social factors such as migration.

Anyone with a genetic predisposition or who experiences environmental risk factors will develop Schizophrenia. The development of the disorder is thought to involve a complex interplay of multiple factors.

What are the signs & symptoms of Schizophrenia?

The symptoms of Schizophrenia can vary from one person to another, and they may come and go over time. The most common signs and symptoms of Schizophrenia include:

  • Delusions: Some false beliefs that are not based in reality, such as believing that someone is plotting against you or that you have special powers.
  • Hallucinations: seeing or hearing things that aren’t there in the present moment, such as hearing voices or seeing people or objects that aren’t present.
  • Disorganized thinking and speech: difficulty organizing thoughts or expressing them clearly, making it difficult for others to understand what the person is trying to communicate.
  • Abnormal motor behavior: repeated motions or movements, such as pacing or rocking, or catatonic behavior, such as remaining motionless for long periods.
  • Negative symptoms: a decrease or absence of emotional display, a lack of drive or enthusiasm, and challenges in feeling enjoyment.
  • Cognitive symptoms: problems with memory, attention, and decision-making.

Patients with Schizophrenia experience all these symptoms, which may vary in severity and duration. The onset occurs in late adolescence or early adulthood, and symptoms may develop gradually or suddenly.

The effects of Schizophrenia on daily routine life.

Schizophrenia can significantly impact a person’s daily routine and overall quality of life. The symptoms of Schizophrenia can affect a person’s ability to work, study, maintain relationships, and engage in everyday activities.

Here are some ways in which Schizophrenia can affect daily life:

Difficulty with work and school: Schizophrenia can make it difficult to concentrate, communicate effectively, and perform tasks, making it challenging to maintain employment or attend school.

Social isolation: Schizophrenia can cause a person to withdraw from social situations & gatherings and isolate themselves from others, impacting their ability to maintain relationships and engage in social activities.

Financial difficulties: The challenges associated with maintaining employment can lead to financial problems, making it difficult to meet basic needs and access healthcare.

Problem with daily activities: The negative symptoms of Schizophrenia, such as lack of motivation and reduced emotional expression, can make it challenging to engage in everyday activities such as cooking, cleaning, and self-care.

Increased risk of substance abuse: Some people with Schizophrenia may start taking drugs or alcohol to cope with their symptoms, leading to other health and social problems.

How to diagnose Schizophrenia?

Diagnosing Schizophrenia typically involves a comprehensive evaluation by a qualified health professional, such as a psychiatrist or clinical psychologist.

To receive a diagnosis of Schizophrenia, an individual must meet specific diagnostic criteria as given in DSM-5, published by the American Psychiatric Association.

The diagnosis is based on a combination of factors, including:

  • Symptoms: The mental health professional will ask about the individual’s symptoms, such as hallucinations, delusions, and disorganized speech or behavior.
  • Medical history: The individual’s medical record will be reviewed to identify any underlying medical conditions or medications contributing to their symptoms.
  • Family history: A family history of mental illness may increase the risk of developing Schizophrenia.
  • Physical examination: A physical exam may be conducted to rule out any underlying medical conditions.
  • Psychological testing: Psychological testing may assess cognitive function and identify any underlying psychological factors contributing to the individual’s symptoms.

How to help if any of your family members have Schizophrenia?

If any member of the family has been diagnosed with Schizophrenia, there are several ways you can offer support and help them manage their condition:

Educate yourself: Learn about Schizophrenia, its symptoms, causes, and treatments. This can help you better understand what your family member is going through and how you can best support them.

Encourage treatment: Encourage your family member to seek professional help and stick with their treatment plan. Offer to help them schedule appointments, accompany them to meetings, and provide emotional support.

Communicate openly and empathetically: Communicate openly with your family member and listen to their experiences without judgment. Offer empathy and support, and avoid trying to minimize or dismiss their feelings.

Be patient and understanding: Schizophrenia can be challenging and unpredictable; recovery can take time. Be patient and understanding with your family member, and avoid getting frustrated or angry with them.

Encourage healthy habits: Encourage your family member to practice healthy habits such as getting enough sleep, eating a healthy diet, and exercising regularly. These habits can improve their overall well-being and improve their symptoms.

Seek support for yourself: Caring for a family member with Schizophrenia can be challenging and emotionally draining. Seek consent for yourself, such as through a support group or therapy, to help you cope with the stress and challenges of the situation.

Primary treatment & medication to treat Schizophrenia?

The treatment of Schizophrenia usually involves a combination of medication, psychotherapy, and support services. Here are some of the common approaches to treating Schizophrenia:


Antipsychotic medications are often used to manage the symptoms of Schizophrenia, particularly positive symptoms such as hallucinations and delusions. These medications work by blocking the activity of dopamine in the brain.

There are both first-generation (typical) and second-generation (atypical) antipsychotics available, and the choice of medication will depend on the individual’s symptoms and medical history.


Psychotherapy, particularly cognitive-behavioral therapy (CBT) and family therapy can help manage the symptoms of Schizophrenia and improve overall functioning.

CBT can help individuals learn to identify and challenge negative thoughts and beliefs, while family therapy can help improve communication and support among family members.

Support services:

Support services such as case management, vocational rehabilitation, and housing assistance can help manage the challenges associated with Schizophrenia and improve the overall quality of life.


In some cases, hospitalization may be necessary to manage severe symptoms or ensure the safety of the individual.

Working with a qualified mental health professional is essential to develop a treatment plan tailored to the individual’s needs and goals.


Schizophrenia is a complex mental health disorder that can significantly impact a person’s life. While the exact accurate causes are not fully understood, effective treatments are available, including medication, psychotherapy, and support services. With proper treatment and support, many patients with Schizophrenia can manage their symptoms and lead healthy lives. It’s essential to raise awareness about Schizophrenia and reduce the stigma associated with mental illness to promote greater understanding and support for those affected by this condition.

Note: We do not provide any medical advice.


1. National Center for Biotechnology Information. (2019). Schizophrenia spectrum and other psychotic disorders. In Diagnostic and Statistical Manual of Mental Disorders (5th ed.). American Psychiatric Association.,residual%20schizophrenia%2C%20and%20simple%20schizophrenia [3-31-2023].

2. National Institute of Mental Health. (2022, March). Schizophrenia. [3-31-2023].

3. Mental Health UK. (n.d.). Types of schizophrenia. [3-31-2023].

4. National Alliance on Mental Illness. (n.d.). Schizophrenia. [3-31-2023].

5. Cleveland Clinic. (n.d.). Schizophrenia. [4-1-2023].


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