Cupping This method has been used in traditional Chinese medicine and a wide variety of other medical traditions since 3000 BC. A vacuum is created in a glass cup by placing a small amount of alcohol at the bottom of the cup, then lighting it and immediately placing it on to the skin. The suction created results in a circular area of purpura that is sharply demarcated. Source: Dermatitis Artefacta, Weinberg's Color Atlas of Pediatric Dermatology, 5e Citation: Prose NS, Kristal L. Weinberg's Color Atlas of Pediatric Dermatology, 5e; 2017 Available at: https://accesspediatrics.mhmedical.com/DownloadImage.aspx?image=/data/books/1913/weinderm5_ch28_f012.png&sec=138563400&BookID=1913&ChapterSecID=138563385&imagename= Accessed: October 13, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved