This is a unique book. This is the result of the practical and research activities of its author, Dr. Andrey Valerievich Ushakov. The book consistently guides the reader-patient from understanding the role of the thyroid gland in the body and the basics of diagnosis, to the mechanisms of disease development and the possibility of recovery. In this book, Dr. Ushakov presents his own views on the basis of pathological processes in the thyroid gland. For the first time, information about the nature and changes of thyroid nodules is published. For the first time, the basics of the reversibility of autoimmune, nodular and diffuse processes are revealed. This book is more than a consultation. This is a sincere revelation from a professional. This is a guide that patients can understand! Illustrations and design by A. V. Ushakov, 2008