Blood letting (or blood-letting) is also known as the removal of blood from a patient to prevent or cure disease and illness. Blood letting was based around a ancient system of medicine which other bodily fluids and blood were regarded as "humors" that had to stay in proper balance to maintain good health. It is said to have been the most common medical treatment performed by surgeons in the late 19th century; a great span of almost 2000 years
Blood letting was first performed in Ancient Egypt around 1000 BCE, later this treatment had spead to the Romans and Greeks. In Greece, blood letting was being used in the fith century B.C; during a life time of hippocrates, who mentions this treatment but generally relied dietary techniques. Archagathus; one of the first greek physicians to treat in Rome; also believed in the value of blood-letting.