Cupping is an ancient Chinese technique that produces suction in a specific area of the body. Glass or plastic cups are applied to the skin with suction causing the flesh to rise about half an inch into the cup. Cupping strongly stimulates blood circulation and helps to move obstructions and alleviate pain. Oftentimes cupping will leave red or purple circular marks called petechiae. These marks disappear within 7-10 days and can reveal the degree of stagnant blood in the area.