HONG KONG - AUGUST 10: A patient receives cupping treatment by Dr. Eason Yu Kin Cho at a Chinese medicine clinic. on August 10, 2016 in Hong Kong. The Chinese treatment, also known as "ba guan", utilizes heated glass cups to create a suction on the patient's skin, causing a circular mark that looks like bruising on the skin. The traditional practice has caught people's attention since U.S. Olympic athletes, including swimmer Michael Phelps, have appeared with circular bruises over his body this week. (Photo by Lam Yik Fei/Getty Images)
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