Gua sha Gua sha (刮痧; guāshā) is abrading the skin with pieces of easy jade, bone, animal tusks or horns or clean stones; till red places then bruising cover the realm to which it is done.in great light, if possible daylight, as you can begin to see the normal colours and coating a lot more simply thenIn TCM, "sample" (证; zhÃ�… Read More