By Dr. Nicole Siegfried, Ph.D., CEDS

Dr. Nicole Sigfried is a clinical psychologist and mental health leader focused on evidence-based care for complex mental health conditions. Her work centers on helping people better understand how brain health, life experiences, and environment interact to shape mental well-being. She regularly writes about mental health education, stigma reduction and accessible treatment so individuals and families can make informed decisions about care.

Schizophrenia is often a misunderstood condition. For a long time, there was a lot of mystery and even fear surrounding this diagnosis. Thankfully, modern science has given us a much clearer picture of what is actually happening in the brain.

When we talk about what causes schizophrenia, it is rarely just one thing. It is usually a combination of factors that come together. My goal today is to answer some of the most common questions with kindness and clear evidence. Let’s look at what we know.

What is schizophrenia?

Dr. Siegfried: Schizophrenia is a serious but treatable mental health condition that affects how a person experiences reality, processes thoughts, and interacts with the world.

Symptoms may include:

• Hallucinations (seeing or hearing things others do not)
• Delusions (strong beliefs that are not based in shared reality)
• Disorganized thinking or speech
• Disorganized behavior

These experiences can feel confusing or overwhelming, but with the right support, many people living with schizophrenia can build stability and meaningful lives.

Schizophrenia usually begins in early adulthood, although symptoms may appear earlier or later in some individuals.

Globally, schizophrenia affects about 24 million people, or roughly 1 in 300 people worldwide.

Learning the facts about schizophrenia can help replace fear and misunderstanding with clearer information.

Is schizophrenia genetic?

Dr. Siegfried: Genetics play an important role in schizophrenia, but they are not the only factor involved.

Research shows that schizophrenia tends to run in families. If a close biological relative has the condition, the likelihood of developing it may increase.

For example:

• The general population risk is about 1%
• If one parent has schizophrenia, risk rises to about 10%
• If an identical twin has schizophrenia, risk may increase to 40% to 50%

These numbers show that genetics can increase vulnerability. However, many people with a family history never develop schizophrenia.

This is why scientists describe schizophrenia as a genetically influenced condition rather than a purely inherited one.

What other biological factors contribute to schizophrenia?

Dr. Siegfried: In addition to genetics, several biological factors may affect the development of schizophrenia.

Research has identified differences in brain structure and brain chemistry among some individuals with the condition. These differences can influence how the brain processes information and responds to stress.

Certain neurotransmitters, including dopamine and glutamate, appear to play a role in symptoms such as hallucinations and disorganized thinking.

Brain imaging studies have also found that some people with schizophrenia show subtle changes in areas responsible for memory, decision-making and emotional regulation.

These biological factors are part of a larger puzzle rather than a single explanation.

Can environmental factors increase the risk?

Dr. Siegfried: Yes. Environmental factors can also influence whether someone develops schizophrenia, especially for people who may already have genetic vulnerability.

Possible risk factors may include:

• Early childhood trauma or chronic stress
• Complications during pregnancy or birth
• Viral infections during pregnancy
• Exposure to certain drugs during adolescence

Studies suggest that prenatal complications and severe early life stress are associated with increased schizophrenia risk.

However, many people who experience these challenges do not develop schizophrenia. Risk factors increase probability, but they do not guarantee an outcome.

What are some common myths about schizophrenia?

Because schizophrenia is often misunderstood, several myths still circulate today.

• Myth — Schizophrenia means having multiple personalities.

Dr. Siegfried: This is one of the most common misconceptions. Schizophrenia is not the same as dissociative identity disorder, which involves multiple identities.

Schizophrenia affects perception and thinking, not identity.

• Myth — People with schizophrenia are dangerous.

Dr. Siegfried: Most people living with schizophrenia are not violent. In fact, individuals with serious mental health conditions are more likely to be harmed than to harm others.

Stigma and misunderstanding often create fear that isn’t supported by research.

• Myth — Schizophrenia cannot be treated.

Dr. Siegfried: While schizophrenia is a long-term condition, treatment can help people manage symptoms and improve quality of life.

With the right care and support, many individuals build fulfilling lives that include relationships, work, and personal growth.

Treatment plans may include:

• Psychiatric medication
• Individual therapy
• Family education and support
• Skills training and psychosocial treatment
• Coordinated specialty care programs

Some people benefit from structured care that offers additional support, such as:

• Partial Hospitalization Programs (PHP)
• Intensive Outpatient Programs (IOP)
• Residential treatment when needed

Recovery looks different for each person, but many people build stable and meaningful lives with the right care.

When should someone seek professional help?

Dr. Siegfried: It may be helpful to reach out to a mental health professional if someone notices symptoms such as:

• Persistent hallucinations or delusions
• Significant changes in thinking or behavior
• Difficulty functioning at work, school or in relationships
• Increasing isolation or confusion

Early assessment can help determine what is happening and guide appropriate treatment options.

Getting answers can reduce uncertainty and create a path forward.

Move toward mental health wellness with help from Lightfully

Understanding the science behind schizophrenia can help remove the fear and blame that often follow this diagnosis. Whether you are dealing with a family history of mental health challenges or are currently navigating symptoms, you deserve a space where you are seen as a whole person, not just a set of symptoms.

At Lightfully, we focus on whole-person-centered care. We believe that because the causes of schizophrenia are complex, the treatment should be too. Our clinical experts provide personalized treatment that looks at your biological needs, your emotional health, and your personal goals.

We offer a variety of levels of care, from supportive residential settings to intensive outpatient programs, to ensure you get the exact amount of support you need. Our mission is centered on empowering people to take charge of their mental health and build a stable, bright future. You do not have to navigate the complexities of brain health alone. We are here to provide the expert care and radical compassion you need to thrive. Your path to a balanced and fulfilling life is ready to begin whenever you are.

Change is possible. When you’re ready to take the first step, reach out to our Admissions Concierge Team. We’ll take the next steps together, toward the fullest, brightest version of you.