Pathology refers to the study of a disease which acts as a connecting link between science and medicine. Psychopathology is the connecting link between the science and clinical practice of psychology. It is the scientific study of abnormal mental states. It has provided a structure for psychiatric diseases and driven clinical and scientific advancement in modern psychiatry. Changes in eating patterns, mood swings, worry or anxiety, distress, irritability or anger, inability to focus, anger, weariness, sleep disturbances, thoughts of self-harm, difficulty coping with daily life, and withdrawal from hobbies and friends are all symptoms studied under psychopathology. Some of the leading causes of mental disorder conditions include genetics, brain chemistry, chronic medical conditions, isolation feeling, lack of social support, alcohol abuse, and traumatic or stressful experiences. The different types of psychopathological disorders include anxiety disorders, bipolar disorders, eating disorders, obsessive-compulsive disorder (OCD), personality disorders, sleep disorders, trauma-related disorder, etc. This book contains some path-breaking studies in the field of psychopathology. It elucidates the concepts and researches with respect to this field. The book is appropriate for students seeking detailed information in this area of psychopathology as well as for experts.