This book presents a comprehensive account on the challenging and mysterious clinical condition of fibromyalgia. Due to being an evidence based study, science cannot always necessarily guarantee results in cases when there is lack of enough supportive evidence. The outcomes may be inconsistent and minor variations are bound to occur. Hence, the intricate question related to fibromyalgia - whether it is truly "real" or just subjective to the patient's mental state - has been discussed in this book. The book mentions the clinical description of fibromyalgia, its pathogen based mechanisms and its treatment methodology, which have been derived from the preponderance of evidence and knowledge indicating towards its objective existence. It has been compiled in a manner to provide the readers with knowledge on diagnostic and treatment modalities for fibromyalgia while simultaneously providing a scope for development of new ideas.