The study of treatment and understanding of the causes and symptoms of mental disorders is known as psychiatry. It has many sub-branches like clinical neurophysiology, pain management, sleep medicine, addiction psychiatry, geriatric psychiatry, psychosomatic medicine, etc. The therapies included in this field are cognitive behavioral therapy, psychotherapy, psychoanalysis, etc. This book provides comprehensive insights into the field of psychiatry. The topics covered in it offer the readers new insights in this area. This textbook aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.