Cupping is a therapeutic technique that uses a vacuum to break up and stasis or toxins stuck in the body. A flame is inserted into the opening of glass cup, pulled out quickly, and placed down on the body, creating a vacuum. This will leave “bruise-like” but not painful marks on the body. The more chronic or exasperated a condition is, the darker the marks will be. They disappear after 2-5 days, depending on the color.