Gua Sha
Gua Sha is a traditional ancient Chinese healing technique used by practitioners of traditional Chinese medicine (TCM) dating back to over two thousands years and involves firmly rubbing a person's skin with a soup spoon, flat piece of jade, or a large coin. 
Gua Sha is used to relieve stagnation from acupuncture channels as well as muscle tissue. This acts by using controlled motions to clear illness from the body. Gua Sha releases the exterior Sha, by moving body fluids and blood, stimulating blood flow and helping to discharge pathogens through the skin. The skin will feel warm and red marks may appear as part of a healthy Gua Sha treatment.