Living with a rare genetic condition like cystinosis presents a unique set of challenges that extend far beyond the physical symptoms. It is a journey marked by moments of uncertainty, resilience, and the ever-present task of balancing medical treatment with emotional well-being. For individuals and families facing cystinosis, the psychological toll can often feel as heavy as the medical burden itself. In this book, "Psychological Support by Cognitive Behavioral Therapy for Cystinosis," I aim to provide a comprehensive guide that not only addresses the biological and genetic aspects of the disease but also focuses on the crucial role of mental health in the overall treatment process. Drawing from years of research in cognitive behavioral therapy (CBT), this manual offers practical tools, strategies, and insights for managing the emotional and psychological effects of living with cystinosis. The structure of this book is designed to take you on a journey—from understanding the biological and genetic foundations of cystinosis to exploring the psychological impacts and offering tailored therapeutic solutions. I begin with the basics of genetics, epigenetics, and the nature of genetic disorders, followed by an in-depth look at trauma, mental health, and pain management. Central to this book is the application of CBT principles, which serve as an empowering approach to coping with the emotional, cognitive, and social challenges that often accompany chronic illness. Each chapter is a stepping stone, guiding the reader through various facets of the cystinosis experience. From learning how to cope with feelings of isolation and frustration with treatment options to addressing the impact on family dynamics, this book provides a supportive framework for navigating the emotional highs and lows. I have also devoted special attention to the importance of managing pain and understanding the intricate ways in which it can affect mental health. Above all, this book serves as a reminder that while the genetic journey can feel isolating, there is hope and strength in knowledge, support, and effective therapeutic techniques. Whether you are a person living with cystinosis, a family member, or a healthcare provider, my hope is that this book will serve as a vital resource for finding balance, resilience, and empowerment through the practice of cognitive behavioral therapy. In writing this preface, I want to acknowledge the courage and determination of every individual affected by cystinosis. This book is for you, a companion on your journey towards mental and emotional well-being.