Gua sha can be used to treat and relieve a variety of illnesses, whether it is useful depends on whether it is gua sha indications, which can be used for such as colds, fever, headache, sore throat and so on. Gua sha is with the index finger and middle finger bent, dipped in water clip pull the skin, resulting in localized blood stasis, which makes the skin appear blood scar of gua sha method, can play a certain blood circulation (to promote the blood run, eliminating the body of blood stasis), dredge meridians, tendon rectification and so on role. The principle of its action to meridian twelve skin theory as the basis, through the benign stimulation of the local skin, so that the meridian points at the congestion, improve the local qi and blood operation, play to get rid of the evil, dredge meridians and collaterals, wind dispersal of cold (to get rid of the wind, dispersal of the cold) or clearing the heat to reduce the fire and so on, so as to achieve the prevention of treatment of disease purposes. Gua sha should not be used without authorization, need to be carried out under the guidance of a doctor.