Trichoscopy is a method of hair and scalp evaluation and is used for diagnosing hair and scalp diseases. The method is based on dermoscopy. In trichoscopy hair and scalp structures may be visualized at many-fold magnification. Currently magnifications ranging from 10-fold to 70-fold are most popular in research and clinical practice. The term "trichoscopy" was first introduced in 2006 by Lidia Rudnicka and Malgorzata Olszewska. The "Atlas of Trichoscopy"(2013) is the first book to systematize scientific knowledge about trichoscopy.