Cupping is a method of treatment used in traditional Oriental medicine that involves heating the air inside a cup and placing the inverted cup on some part of the body. A vacuum is created, which anchors the cup to the skin and pulls the skin upward. It is believed by practitioners of traditional Oriental medicine that disease is due to stagnation or blocked qi. Cupping unblocks and realigns qi, thereby restoring health. "Wet" cupping involves puncturing the skin before applying the cup. It is believed that this allows "poisons" and "toxins" to be sucked out of the body. In some cases, the cup may be moved while still suctioned to the skin, causing a regional pulling of the skin and muscle. This technique is called gliding cupping.