Gua sha Gua sha (刮痧; guāshā) is abrading the pores and skin with parts of sleek jade, bone, animal tusks or horns or sleek stones; till purple places then bruising address the region to which it is done. For more on the speculation of how external Warmth penetrates, see https://kylerdo0b3.wikilinksnews.com/5222386/examine_this_report_on_chinese_medicine_bloating