The exact causes of schizophrenia aren't fully understood at present. It's thought to be caused by a combination of things. The most important factor is having a relative with schizophrenia. Studies have shown that if one parent is affected, the risk of having a child with schizophrenia is about 13 in 100.This rises to about 46 in 100 if both parents are affected. Schizophrenia may be linked to changes in the brain. Your brain sends signals from nerve to nerve using chemicals called neurotransmitters. If you have schizophrenia, the neurotransmitters are out of balance.
Attribution: BUPA