Gua Sha has the function of dredging the tendons and veins, activating blood circulation and removing blood stasis (promoting blood circulation and eliminating blood stasis in the body), and for patients with blood stasis and obstruction, it is possible to scrape Gua Sha during menstruation under normal circumstances. Scraping belongs to the external treatment method of Chinese medicine, mainly through the use of scraping tools hard massage points to stimulate the skin, in order to promote blood circulation, so as to achieve the role of dredging the tendons and veins, activate blood circulation and eliminate blood stasis. The body has blood stasis obstruction of patients, under normal circumstances can scraping, but should pay attention to the local skin has broken patients do not recommend scraping. In addition, after the completion of gua sha should pay attention to keep warm, in order to prevent the invasion of foreign evil. If you need to use gua sha therapy, it is recommended to go to a regular hospital, under the guidance of a professional physician to identify the treatment.