Gua Sha a traditional Chinese healing technique that could mimick physical abuse: a potential issue with forensic implications. A case study.

Gua Sha (press-stroking) is a traditional Chinese healing technique utilized to combat pain, common cold, heatstroke, and respiratory problems. Patterned ecchymoses may appear due to the action of scraping and scratching repeatedly in a unidirectional manner, with a smooth edge over a lubricated area. They may be very informative, since they, generally, reproduce the shape of the injurious agent. However, many confounding factors can make the identification of the lesions difficult. A case of a 43 year-old Chinese woman, hospitalized for abdominal pain, is reported. An unusual pattern of reddish ecchymoses on the back was present. After a careful investigation, ecchymoses were attributed to Gua Sha. The case demonstrated that clinicians and forensic pathologists should also consider press-stroking, and other similar techniques in adults who present scratch-like marks or ecchymoses on various body districts, even if they have an unusual pattern.