Scraping blisters may be due to scraping the wrong strength and way, resulting in skin damage blisters. Gua Sha method refers to the benign stimulation of the body surface, to achieve dredging meridians and collaterals, line qi and blood, regulate the role of internal organs of a method. The main performance after scraping Gua Sha is to make the local tissue capillary expansion, congestion, blood overflow, the formation of ecchymosis petechiae. Therefore, normal gua sha operation is not easy to blister, and blisters are mostly caused by skin lesions. Scraping blisters, should immediately stop scraping. Small blisters can be allowed to self-absorption healing, large blisters should go to the hospital to deal with, to avoid infection. Scraping time is about 20 minutes, in order to patient tolerance. Although the scope of Gua Sha treatment is wide, it is forbidden for pregnant women, drunkenness, excessive fatigue, patients with bleeding or coagulation abnormalities and so on. Scraping Gua Sha is not suitable after a full meal or when hungry. Avoid taking a cold shower 4 hours after scraping Gua Sha. Scraping therapy needs to be carried out by a professional physician, do not operate on your own to avoid risks.