It is the medical specialty dedicated to pain relief and patient care before, during and after a surgical procedure; To do this: it regulates the patient's level of consciousness, stabilizes their body parameters (body temperature, blood pressure, respiration, body fluids, function: heart, lung and kidney) within a normal range. In addition, it deals with the treatment of acute or chronic pain for non-surgical reasons, for example: analgesia during natural labor and pain relief in cancer patients.