The book Cosmetological and medical trichologywas prepared by dr Claudia Musiał, an international expert in the field of trichology and cosmetology. It presents the whole spectrum of trichopathology, which is vital to adequately comprehend a patient’s clinical picture. The book addresses: the anatomy and physiology of scalp and hair, classification of haired scalp diseases, which makes it much easier to correctly interpret a patient’s clinical data, clinical features, pathogenesis, medical treatment in case of various dermatoses, laboratory diagnostics, histological features with clinical description, trichoscopic features, classification of hair types and types of hair damage, endocrinology basics, nutrition. One of important parts is also a chapter on work organisation at a trichological clinic. Its aim is to help to adequately understand the pathophysiology and clinical pictures of hair and hair damage, and medical and surgical treatments in scalp diseases. The book is directed at students. However, a complex view of the subject and valuable instructions will surely be useful for trichology practitioners, dermatologists or cosmetologists who treat patients with excessive hair loss.