Family therapy is a branch of psychotherapy. Psychotherapy is a general term referring to therapeutic interaction or treatment contracted between a trained professional and a client or patient; family, couple or group. The problems addressed are psychological in nature and of no specific kind or degree, but rather depend on the specialty of the practitioner.
Psychotherapy aims to increase the individual's sense of his/her own well-being. Psychotherapists employ a range of techniques based on experiential relationship building, dialog, communication and behavior change that are designed to improve the mental health of a client or patient, or to improve group relationships (such as in a family).
Family therapy, also known as couples therapy, family therapy and family systems therapy, works with families and couples in intimate relationships to nurture change and development. It tends to view change in terms of the systems of interaction between family members. It emphasizes family relationships as an important factor in psychological health.