GuaSha is a traditional Chinese healing method. The technique is performed by gently scraping the lubricated or dry surface tissue, most commonly of the upper back and neck with a smooth tool. This scraping motion sometimes produces light petechiae on the skin that can vary from light pink to red and even purple. By speeding up blood flow, it helps blood circulation and improves lymphatic circulation. It also provides nutrition to the muscles and peripheral nerves and further promotes the metabolism of the whole body. GuaShastrengthens cellular immunity and increases defense against disease.