History of internal medicine at the end of the nineteenth century began to develop testicular medicine, closely linked to university clinics, and emerged a new approach to general practice, morelinked to basic biomedical science and experimentation, which was named Internal Medicine. The internist has been considered since then, the clinician par excellence, the example of the physician in any historical epoch. Within this field surgical diseases were excluded, the obstetric and pediatric, which also constituted other specialties. These, along with internal medicine have been considered, since that time, as basic specialties. Internal Medicine The name seems to have originated in Germany in 1880. In that year, Strumpell wrote the first treatise of Internal Diseases and 2 years later, in Weisbaden, held the First Congress of Internal Medicine.It would indicate a field of medical practice in which the objects were based on the new knowledge emerging in physiology, bacteriology and pathology, and the exclusion of surgical methods in the treatment employed. This new field, also carried the connotation of an education and training and these doctors could do to consultants or other specialists. That is internal medicine would be like medicine that treats disease from within, from inside the body, usually with drugs, as opposed to surgery that treats diseases from outside, with surgical interventions. From the second half of the twentieth century emerging medical specialties, internal medicine fields.You can fall into the error that seriously harms the patient, that specialists do not take responsibility with patients who fall outside the area of their particular qualifications and has been ever more frequently to the same patient multiple physicians you are receiving care, with most diverse and sometimes contradictory approaches. Currently in Spain templates medical internists are the largest in the entire health system, however a lot of them work in emergency services, guards, and interim work. Within 10 years is expected to replace older workers following the retirement of 15 of these specialists. Neither the different regional societies, the Spanish society and the vast majority of interns have been able to convey both the patients and to administer and manage the centerpiece of this specialty paper, being from birth a specialty in crisis, whose professionals represent the ideal universal medical, humanistic and scientific society so badly needs.Other countries more practical, with its many defects on the other hand, have recognized the fundamental role of internal medicine to be a professional quality, particularly in the United States all specialists have to spend 2 years in Internal Medicine and overspecialized later, however, that seed remaining, this quest for perfection based on the study that is instilled in both internal medicine services in all professionals.