Cupping is an ancient practice that involves placing glass, bamboo, or plastic cups on the skin and creating suction to lift the skin and underlying tissues. It is thought to improve circulation, relax muscles, and remove toxins. There are two main methods - fixed cupping leaves the cups in place for up to 30 minutes, while moving cupping involves massaging oils on the skin and dragging the cups around to treat tension in the back, legs, and arms. Cupping has a long history in China and the Middle East and was advocated by ancient Greek physicians, though modern techniques now use plastic cups.