This book is a comprehensive introduction to the fundamentals of Chinese Fingernail Image Diagnosis (FID), a non-invasive clinical examination which can assess an individual's state of health. FID can be used as an auxiliary diagnostic method to provide diagnostic clues and proper guidance for treatment. One great strength of this method is its non-invasive nature. Formed by blood and Qi between the nail bed and nail plate, the fingernail image can be used to observe pathological changes within the body. This book equips readers with the knowledge needed to analyse fingernail images and assess them for diagnostic purposes. Covering the origins of Fingernail Image Diagnosis, methods of examination and the practical application of FID for assisting diagnosis in a wide range of common disorders, the authors provide a complete guide to FID, with illustrations, visuals and detailed case examples. This practical quick reference guide and introduction to FID will be useful for anyone interested in diagnostic techniques, especially those working in the fields of Chinese Medicine, integrative medicine and alternative healthcare.