What is psychosis?

Causes of psychosis

The causes of psychosis are not fully understood. It is likely that psychosis is caused by a number of factors including: 

• genetic vulnerability – family history of psychotic disorder
• chemical imbalance in the brain
• substance use, particularly cannabis, speed or ice
• environmental factors
• psychosocial stress – for people who have had an episode of psychosis, significant stress may be a factor in the development of further episodes.