The<unk>  are complex, and interact and vary according to the particular<unk> and individual. Genetics, early development, drugs, disease or injury, neurocognitive and psychological mechanisms, and life experiences, society and culture can all contribute to the development or progression of different mental<unk> .
Causes of mental disorders
Mental disorder causes
Mental disorder risk factors
Personality disorder causes
Dementia causes
Cancer causes
Fifth disease causes
Schizophrenia causes