Cupping is the treatment of disease by suction to the skin surface by attaching small jars in which a vacuum is created by introducing heat in the form of an ignited alcohol-soaked cotton ball. The jars may be of bamboo or glass and in various sizes. The rims must be even and smooth. The cupping theory can help warm meridians, promote the flow of qi and blood, eliminate cold and dampness, and relieve swelling and pain. It is often used for painful joints, rheumatism, office syndrome, stiff neck, lower back pain, common cold, cough, asthma.