Expressed emotion is the level of emotion, mainly negative, expressed towards a patient by their carers. This can be verbal criticism of the person with schizophrenia, occasionally accompanied by violence, hostility towards them, including anger and rejection, emotional involvement in their life, including needless self-sacrifice. These high levels of expressed emotion are a source of stress for the patient. It may be a source of stress that triggers schizophrenia in a person who is genetically vulnerable.