The understanding of human behavior and psychological phenomena related to healthcare falls under within sphere of health psychology. Its central objective is to understand health and disease prevention. The discipline is broadly categorized into four branches, public health psychology, clinical health psychology, community health psychology, and critical health psychology. Each branch contributes uniquely to the broader understanding and application of health psychology principles. Health psychology is an upcoming field of science that has undergone rapid development over the past few decades. Most of the topics introduced in this book cover new techniques and the applications of health psychology. Those with an interest in this field would find this book helpful.