The subject of health psychology deals with the study of human behavior and psychological processes concerned with healthcare. The main focus of this field is developing an understanding of health and prevention of diseases. Health psychology is primarily divided into four branches - community health psychology, clinical health psychology, critical health psychology and public health psychology. This textbook, with its detailed analyses and data, will prove immensely beneficial to professionals and students involved in this area at various levels. Through it, we attempt to further enlighten the readers about the new concepts in this field.