The exact causes of schizophrenia are unknown. Research suggests a combination of physical, genetic, psychological and environmental factors can make a person more likely to develop the condition.

Some people may be prone to schizophrenia, and a stressful or emotional life event might trigger a psychotic episode. However, it’s not known why some people develop symptoms while others do not. 

• Genetics – Schizophrenia tends to run in families, but no single gene is thought to be responsible.
• Differences in brain development – Studies of people with schizophrenia have shown there are subtle differences in the structure of their brains.
• Neurotransmitters – are chemicals that carry messages between brain cells. It is thought people with schizophrenia may have different amounts of certain neurotransmitters in their brains.
• Triggers – things that can cause schizophrenia to develop in people who are at risk. Main psychological triggers of schizophrenia such as bereavement, losing your job, divorce, physical or sexual abuse etc.  
• Drug Abuse – Studies have shown using drugs, particularly cannabis, cocaine, LSD or amphetamines, can increase the risk of developing schizophrenia, psychosis or a similar illness.