Pushing the back of the Gua Sha is a normal phenomenon, pushing the back of the benign stimulation of the skin makes the subcutaneous capillary expansion, bending, rupture, blood spillage into the ecchymosis spot, that is, Gua Sha. Push back under normal circumstances will also be out of Gua Sha, Gua Sha color is mostly purple red, color color purple dark dark too deep black may be related to the external evil. Through push back gua sha can achieve dredge meridians and channels, line qi and blood (promote gas operation so that blood circulation), adjust the function of internal organs, is conducive to drive away the evil out. Push gua sha need to be uniform, strength should be from light to heavy, according to the patient’s physique and age to the patient can withstand to the extent that the gua sha is not the more the better, too heavy may cause flesh damage. The specific operation needs to be carried out by a professional physician.