Guasha can make the body's Qi and blood flow smoothly, act on the nervous system of the human body, strengthen the body's defense function, and also act on the circulatory system, increasing the speed of blood reflux and enhancing circulation, which is conducive to accelerating the body's metabolism. It can not only achieve the effects of promoting Qi and blood circulation, sweating and relieving the exterior, relaxing muscles and activating collaterals, regulating the spleen and stomach, but also have a certain antipyretic and analgesic effect.