Gua sha Gua sha (刮痧; guāshā) is abrading the skin with pieces of smooth jade, bone, animal tusks or horns or clean stones; till purple spots then bruising cover the realm to which it is done. As of 2007[update] there have been not more than enough very good-high-quality trials https://dallas7b07t.bloggerchest.com/23774191/chinese-medicine-body-clock-for-dummies