Schizophrenia is not generally referred to as a genetic disorder. It is a mental illness that does have some relationship to heredity. Hypertension and diabetes, for example, have a heritability rate of 80%. However, because psychiatric disorders are caused by multiple genes and each gene has a small effect, it can be called a micro-effect gene. Multiple micro-effect genes acting together, together with environmental factors, cause the patient to develop the disease. Psychosis and the like can also be considered as a genetic problem like psychosis, so it is important to pay attention to it. For example, if there is a family history of psychosis, there is usually not necessarily a genetic history of psychosis, but there is uniparental inheritance, for example, if the father has it and the children also have it, that is, if each generation has it, it is called dominant inheritance. Psychosis is a recessive, polygenic disorder, so it does not occur in every generation, but only when the patient has the gene and there are multiple genetic influences in the body. Also, environmental factors are important. If the environment is harsh, along with genetic factors, the disease may develop. If the environmental factors that have little influence, it is possible that the disease will not develop. In conclusion, there is no need for the patient’s family to worry too much about the genetic history of the disease, the diagnosis and treatment is not much different.