Chronic back pain sufferers, this book is for you. If you are living with persistent lower back pain that keeps being dismissed, it is worth knowing about Bertolotti Syndrome, a little-known condition that is often missed on scans and poorly understood in clinical practice. For some people, it is the hidden cause of years, even decades, of suffering. Bertolotti Syndrome involves an abnormal vertebra or upper sacral segment present from birth. When that variation becomes painful, it can affect the mechanics of the spine, place stress on surrounding structures, and cause recurring pain that interferes with movement, work, rest, and daily life. Written for people searching for answers, this book explains the condition in clear language, sets out current research and treatment pathways, and offers practical guidance grounded in both lived experience and clinical knowledge. If your back pain has never been properly explained, this book may help you ask the question that changes everything: could this be Bertolotti Syndrome? For those who already know they have Bertolotti Syndrome, this book aims to bring together as much relevant information as possible in a single volume.