Psycho-oncology is a field of study and intervention in the psychosocial aspects associated with the diagnosis and treatment of patients, their families and the health team, and also linked to aspects that affect the risk of developing cancer. In this sense, categories, methods and techniques related to health psychology are used in two large areas: the study of the psychosocial elements that can intervene in the etiology and course of cancer and in the intervention to improve the quality of life of those involved.