Psychoanalysis, or psychoanalysis, is a discipline founded by Austrian psychiatrist sigmund freud in the early 20th century. At that time, psychiatry was generally influenced by biology, and the formation, development and treatment of psychological phenomena were carried out in a mechanistic way popular in the industrial revolution era. Freud went to Paris in 1885, studied under the famous psychiatrist and brain scientist Xia Ke, and was influenced by Xia Ke's hysteria, and began his research on early or childhood traumatic experiences and emotional diseases.