Psychotherapy is a term, which can be applied to a wide range of interventions and treatments used to help sufferers from mental health problems of all sorts, including depression. It encompasses all types of treatment where two individuals (a therapist and a patient) collaborate together to address a problem presented by the latter. This usually entails a commitment from both of them to a series of meetings, usually on a regular basis, in a setting associated with the care of ill people, in order to further this aim.