Gua Sha is an ancient therapeutic technique rooted in Traditional Chinese Medicine (TCM) that involves gently scraping the skin with a smooth tool to stimulate healing, relieve tension, and restore balance. While the distinctive red marks left on the skin are visible, the most important effects occur beneath the surface — in muscles, fascia, blood, lymph, nerves, and even at the cellular level. Understanding what happens under the skin can help explain why Gua Sha is so effec