This book provides an insight into the emerging trends in pathogenesis, diagnosis and management of many diseases associated with visceral pain. Key features of the book include overviews of nociceptive pathways and hormonal modulation related to the pathogenesis of functional and other disorders. The text gives a lucid view of novel aspects of pain generation and perception. This book aims to provide a framework for understanding the most significant signaling processing in order to unravel the enigma of visceral pain. This book is expected to be a valuable resource for clinicians and scientists who are interested in recent research trends associated with nociceptive diseases. It is also recommended to students, health care providers and patients who seek a fundamental understanding of neuronal modulatory systems.