Mental disorders are divided into organic mental disorders and functional mental disorders. Organic mental disorders mainly include: first, mental disorders caused by brain diseases, including Alzheimer’s disease and other organic mental disorders, such as Alzheimer’s disease, epileptic mental disorders, mental disorders caused by the central nervous system, such as mental disorders caused by encephalitis, mental disorders caused by intracranial tumors of cranial brain injury. Second, mental disorders due to somatic diseases, mental disorders due to somatic infections, functional mental disorders, which are more serious mental disorders, including schizophrenia, schizoaffective psychosis, paranoid psychosis, mental retardation, affective disorders, etc., and less serious mental disorders, such as neurotic disorders, psychophysiological disorders, psychosomatic disorders, etc. Stimulus-induced mental disorders, such as psychogenic mental disorders, mainly include stress reactions, post-traumatic stress disorder, etc., and personality disorders.