For those of us involved in research on the neural mechanisms that relate tissue damage to pain. it is becoming more evident that the sensation of pain and suffering could be considered as part of a mechanism that involves not only sizeable areas in the brain but also simultaneous activations of the immune and the endocrine systems as well. A consensus is growing among specialists in the field that pain involves the sharing of molecular mechanisms between the nervous, immune and endocrine systems that can interact at peripheral and, ultimately, central levels. Furthermore, chronic pain could...