Pain is generally described as an unpleasant sensation. Pain, as a concept and symptom, is discussed and described throughout professional and lay medical literature. Pain is the reason for initial contact with any physician for the vast majority of medical problems, e.g., abdominal pain, chest pain, limb pain, low back pain. As such, pain condition classification is very sophisticated and advanced, as demonstrated by the IASP Chronic Pain Classification system (Merskey & Bogduk, 1994) and others (Derasari, 2000; Waldman, 2003).