Cupping is an alternative therapy that involves suctioning the skin with glass, plastic, or silicone cups. It may help improve blood flow, boost immune function, remove toxins, and reduce pain. Cupping involves placing small cups (glass, bamboo, plastic, silicone, or ceramic) on problem areas of the body and creating suction, which draws fluid into the skin and pulls the tissue slightly up into the cup. This process increases blood flow, stimulates the immune system, and improves lymphatic system flow. In turn, this may help relax muscles and tissues, relieve pain, and trigger the body's natural healing process.