Many patients and their families have had such questions, but there are still no definite conclusions due to the current scientific development. In general, the occurrence of a disease is caused by a combination of genetic, environmental, social and psychological factors. For example, patients with hypertension generally have a family history of congenital hereditary disease, acquired bad dietary habits, coupled with work, life, mental stress caused by a combination of; if only genetic qualities, but no bad habits later in life will not necessarily lead to hypertension. Mental illness is the same, the patient has genetic qualities and character traits, in a specific social, psychological stress conditions appear mental problems; if only genetic qualities, but good character, no specific social, psychological stress events also will not appear mental problems.