Cupping is a form of therapy where cups are applied around the body (typically the back) to encourage blood circulation and muscle relaxation. Acting as a vacuum, they harmlessly pull layers of tissue and treat sore, stressed, and restricted tissue. Cupping relaxes muscles that become locked and facilitates a natural healing process by opening the blocked areas. The size and number of cups used, as well as the specific technique applied, varies according to each condition being treated. Reasons to undergo cupping therapy include general pain, scar tissue, inflammation, skin problems, and blood disorders.