This is a practical guide for any TCM practitioner to arrive at a clear, logical and rational TCM diagnosis with the help of tongue pictures and the patients' histories. It is a bridge between TCM and scientific, allopathic medicine. Each change of the tongue is explained from the point of view of TCM and allopathic medicine.From this comprehensive guide, the reader will be able to follow the step-by-step directions to see and understand all significant tongue changes, and thus able to arrive at an effective diagnosis and rational therapy for any patient.