Causes of schizophrenia

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Causes

It's not known what causes schizophrenia, but researchers believe that a combination of genetics, brain chemistry and environment contributes to development of the disorder.

Problems with certain naturally occurring brain chemicals, including neurotransmitters called dopamine and glutamate, may contribute to schizophrenia. Neuroimaging studies show differences in the brain structure and central nervous system of people with schizophrenia. While researchers aren't certain about the significance of these changes, they indicate that schizophrenia is a brain disease.

Risk factors

Although the precise cause of schizophrenia isn't known, certain factors seem to increase the risk of developing or triggering schizophrenia, including:

  • Having a family history of schizophrenia
  • Some pregnancy and birth complications, such as malnutrition or exposure to toxins or viruses that may impact brain development
  • Taking mind-altering (psychoactive or psychotropic) drugs during teen years and young adulthood

Complications

Left untreated, schizophrenia can result in severe problems that affect every area of life. Complications that schizophrenia may cause or be associated with include:

  • Suicide, suicide attempts and thoughts of suicide
  • 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
  • Health and medical problems
  • Being victimized
  • Aggressive behavior, although it's uncommon

Prevention

There's no sure way to prevent schizophrenia, but sticking with the treatment plan can help prevent relapses or worsening of symptoms. In addition, researchers hope that learning more about risk factors for schizophrenia may lead to earlier diagnosis and treatment.

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