Step one: she warms the tissue. A tight pathway can't drain. Warm it, and it opens. Studies on circulation found that heat and vibration together worked better than either one alone. Heat isn't magic. It's the first step, and without it the next two can't do their job.
Step two: she stimulates. Light, rhythmic, repeated pressure encourages the vessel walls to contract and move fluid. It's the pump your system doesn't have.
Step three: she sweeps. Upward, along the drainage lines, toward the nodes. This is the technique Emil Vodder formalized in Paris in 1936. The contoured edge comes from gua sha, 5,000-year-old stone tools. In a German clinical trial, gua sha beat a heating pad for neck pain within one week.