Biological Mechanisms and Causes
The exact cause of schizophrenia is not fully understood, but it is believed to result from a combination of factors. Research suggests that differences in brain structure and central nervous system chemistry play a significant role. Specifically, problems with certain naturally occurring brain chemicals, including neurotransmitters called dopamine and glutamate, may contribute to the disorder. Neuroimaging studies have also shown differences in the brain structure and central nervous system of people with schizophrenia compared to those without the condition.

Risk Factors
Several factors increase the likelihood of developing schizophrenia, though having these risks does not guarantee the condition will occur. These include:

• Genetics: A family history of schizophrenia significantly increases risk, suggesting a hereditary component.
• Environmental factors: Exposure to viruses, toxins, or malnutrition while in the womb, particularly during the first and second trimesters.
• Brain development: Issues during birth, such as low oxygen levels, may contribute to risk.
• Substance use: Taking mind-altering (psychoactive) drugs, particularly cannabis, during teenage years and young adulthood has been linked to an increased risk.
• Paternal age: Older age of the father at the time of conception is a known risk factor.

Prevention
There is currently no sure way to prevent schizophrenia. However, early identification and treatment of the initial symptoms can help get symptoms under control before serious complications develop. Strategies to reduce risk or severity include avoiding the use of recreational drugs, particularly during adolescence, and managing stress. For individuals with a high genetic risk, early intervention programs focusing on cognitive development and social support may help delay or mitigate the onset of symptoms.

Signs and Symptoms
Symptoms typically develop slowly over months or years, although they can appear suddenly. They are generally categorized into three areas: positive, negative, and cognitive symptoms.

• Positive symptoms: These are psychotic behaviors not seen in healthy people. They include hallucinations (seeing, hearing, or smelling things that are not there), delusions (false beliefs that are not based in reality), thought disorders (unusual or dysfunctional ways of thinking), and movement disorders (agitated body movements).
• Negative symptoms: These refer to disruptions to normal emotions and behaviors. Symptoms include a "flat affect" (reduced expression of emotions via facial expression or voice tone), reduced feelings of pleasure in everyday life, difficulty beginning and sustaining activities, and reduced speaking.
• Cognitive symptoms: These are subtle but can be severe, involving problems with "executive functioning" (the ability to understand information and use it to make decisions), trouble focusing or paying attention, and problems with working memory (the ability to use information immediately after learning it).

Diagnosis
Diagnosing schizophrenia involves ruling out other mental health disorders and determining that symptoms are not due to substance abuse, medication, or a medical condition. The process typically includes:

• Physical exam: To rule out other problems that could be causing symptoms and to check for related complications.
• Tests and screenings: These may include tests that help rule out conditions with similar symptoms and screening for alcohol and drugs. The doctor may also request imaging studies, such as an MRI or CT scan.
• Psychiatric evaluation: A doctor or mental health professional checks mental status by observing appearance and demeanor and asking about thoughts, moods, delusions, hallucinations, substance use, and potential for violence or suicide.
• Diagnostic Criteria: Clinicians use criteria from the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) which generally requires that at least two of the major symptoms be present for a significant portion of time during a one-month period, with some level of disturbance persisting for six months.

Differential Diagnosis
Schizophrenia is often confused with other conditions that cause psychosis, such as bipolar disorder, severe depression with psychotic features, schizoaffective disorder, and substance-induced psychotic disorder. Medical conditions like brain tumors or autoimmune encephalitis can also mimic symptoms.

Medications
Medications are the cornerstone of schizophrenia treatment, and antipsychotic medications are the most commonly prescribed. They are thought to control symptoms by affecting the brain neurotransmitter dopamine. The goal is to effectively manage signs and symptoms at the lowest possible dose. Psychiatrists may try different drugs, different doses, or combinations over time to achieve the desired result. Other medications, such as antidepressants or anti-anxiety drugs, may also be helpful.

Psychosocial Interventions
Once psychosis recedes, psychological and social interventions are important. These may include:

• Individual therapy: Psychotherapy may help normalize thought patterns and teach coping strategies for stress and early warning signs of relapse.
• Social skills training: This focuses on improving communication and social interactions and the ability to participate in daily activities.
• Family therapy: This provides support and education to families dealing with schizophrenia.
• Vocational rehabilitation and supported employment: This focuses on helping people with schizophrenia prepare for, find, and keep jobs.

Lifestyle and Self-Care
While professional treatment is essential, self-care strategies can support recovery. This includes managing stress, getting adequate sleep, avoiding alcohol and recreational drugs, and maintaining a healthy diet and exercise routine to counteract medication side effects like weight gain.

When to Seek Medical Care
Active management is crucial. You should contact a healthcare professional if:

• Worsening symptoms: You notice a return or increase in hallucinations, delusions, or inability to function.
• Side effects: Medication side effects become difficult to manage or disruptive.
• Emergency situations: If an individual poses a danger to themselves or others, or expresses suicidal thoughts, immediate emergency care is required. Call emergency services or go to the nearest hospital emergency room.

Severity and Disease Course
Schizophrenia is a serious condition that varies in severity among individuals. The course of the illness typically involves episodes of active psychosis alternating with periods of remission where symptoms improve. Some individuals experience a gradual worsening of functioning over time, while others may stabilize. Early treatment is a key factor in reducing the severity of the long-term course.

Complications and Long-Term Effects
If left untreated, schizophrenia can result in severe problems that affect every area of life. Complications may include:

• Suicide, suicide attempts, and thoughts of death.
• Self-injury.
• Anxiety disorders and obsessive-compulsive disorder (OCD).
• Depression.
• Abuse of alcohol or other drugs, including nicotine.
• Inability to work or attend school.
• Financial problems and homelessness.
• Social isolation.

Life Expectancy and Health Risks
People with schizophrenia have a reduced life expectancy, often estimated to be 10 to 20 years shorter than the general population. This is not usually due to the mental condition itself but rather to co-occurring medical conditions such as heart disease, diabetes, and metabolic syndrome. These physical health issues are often exacerbated by lifestyle factors like smoking, poor diet, and lack of exercise, as well as side effects from antipsychotic medications. There is also a higher risk of suicide compared to the general population.

Prognosis
While there is no cure, the prognosis has improved with modern treatments. Many people with schizophrenia can live independently and have satisfying relationships and jobs. The outlook is generally better for those who start treatment shortly after symptoms begin, have a strong support system, and adhere to their treatment plan.

Impact on Daily Activities
Schizophrenia can significantly disrupt daily functioning. Individuals may struggle with personal hygiene, maintaining a home, or managing finances. The cognitive symptoms, such as difficulty focusing or remembering, can make work or school challenging. Socially, the condition can lead to withdrawal and isolation due to paranoia or difficulty reading social cues. Stigma surrounding the disorder can further exacerbate feelings of loneliness and exclusion.

Coping Strategies
Living with schizophrenia requires ongoing management. Effective coping strategies include:

• Sticking to a treatment plan: Taking medications as directed is vital, even when feeling better.
• Maintaining a routine: A structured daily schedule can help reduce stress and improve sleep.
• Avoiding drugs and alcohol: These can worsen symptoms and interfere with medications.
• Joining a support group: Connecting with others facing similar challenges can provide understanding and reduce isolation.
• Stress management: Techniques like meditation or relaxation exercises may help reduce anxiety.

Questions to Ask Your Healthcare Provider
To better understand the condition and manage health, consider asking these questions:

• What specific type of schizophrenia or psychotic disorder do I have?
• What are the potential side effects of the prescribed medication, and how can I manage them?
• How long will I need to take medication?
• What signs should I look for that indicate a relapse is starting?
• Are there local support groups or social services available for housing or employment?
• How will this condition affect my physical health, and what screenings do I need?
• What should my family do in case of an emergency?

Q: Is schizophrenia the same as a split personality?
A: No, this is a common myth. Schizophrenia refers to a "splitting" of mental functions and a disconnect from reality, not a split into multiple personalities. Dissociative Identity Disorder (formerly multiple personality disorder) is a separate and distinct condition.

Q: Are people with schizophrenia violent?
A: Most people with schizophrenia are not violent. In fact, they are more likely to be victims of violence than perpetrators. When violence does occur, it is often related to untreated psychosis or substance abuse, but it is not a defining characteristic of the illness.

Q: Can people with schizophrenia work and have a normal life?
A: Yes, many people with schizophrenia live full, productive lives. With effective medication, therapy, and social support, individuals can work, attend school, and maintain relationships.

Q: Is schizophrenia caused by bad parenting?
A: No. Decades of research have shown that schizophrenia is a biological brain disorder with genetic and environmental roots. It is not caused by childhood upbringing or parenting styles.

Q: Can schizophrenia be cured?
A: There is currently no cure for schizophrenia, meaning the underlying condition does not go away. However, it is highly treatable. Many people experience significant symptom reduction and recovery of functioning with ongoing management.