This book, based on the theory of traditional Chinese medicine, gives a detailed introduction to the discovery of diseases of human body, either existing already or to be developed, by observing human face, chest, torso and limbs, etc. and reminds patients to see doctor as soon as possible. The words used in this book are plain and easy to understand. The methods for self-diagnosis are simple and easy to learn. With various illustrations, it is readable and helpful to teachers and students of medical schools, practitioners and those who are interested. Content is in English.