Disadvantages: Cupping can stimulate human skin, meridians and acupoints to eliminate toxins, dredge meridians, promote blood circulation, enhance the body's resistance, promote metabolism and mobilize the functions of viscera. Cupping is harmless, as long as the location and time of cupping are well controlled, it is a good health care therapy. Cupping seal should not be cupped before it fades; Benefits: 1, mechanical stimulation. Cupping therapy is to exhaust air, so that negative pressure is generated in the tank, so that the edge of the tank is closely attached to the skin surface, pulling nerves, muscles, blood vessels and subcutaneous glands, which can cause a series of neuroendocrine reactions, adjust the vasomotor function and vascular permeability, and thus improve local blood circulation. 2. Negative pressure effect. The negative pressure of cupping makes local congestion and congestion rapidly, even small capillaries rupture, red blood cells are destroyed and hemolysis occurs. Hemoglobin released by red blood cells is a benign stimulus to the body, which can regulate the functions of tissues and organs in two directions through the nervous system, promote the phagocytosis of white blood cells, improve the sensitivity and tolerance of skin to external changes, and thus enhance the immunity of the body. Secondly, the strong suction of negative pressure can make sweat gland pores fully open, the functions of sweat gland and sebaceous gland are stimulated and strengthened, and the aged cells on the skin surface fall off, thus accelerating the discharge of toxins and wastes in the body. 3。 Warm action. The local warming effect of cupping not only increases blood vessel dilation and blood flow, but also enhances the permeability of blood vessel wall and phagocytosis of cells. The changes of vascular tension and mucosal permeability, accelerated lymphatic circulation and enhanced phagocytosis during cupping undoubtedly formed a good environment against biological causes for infectious diseases. In addition, the chronic stimulation of hemolysis has a health care effect on human body.