From Hippocratic medicine through modern theory, the concept and physiopathology of pain has been developed from religious and philosophical to a more scientific concept. Different cultures have developed different words to express pain and we are still far from a comprehensive understanding of pain. In clinical practice, a good understanding of history is important and multidisciplinary collaboration should be used to help the patient with both acute and chronic pain. In this book we have gathered evidence from international researchers and practitioners involved with both acute and chronic pain issues with the hope that this information will be of use to the reader.