Michael Phelps' Weird Bruises: Does Cupping Therapy Really Work?

Several Olympic athletes, including swimmer Michael Phelps, have appeared in Rio with odd-looking circular marks on their bodies. Although many athletes say they've experienced benefits from the therapy, there are few rigorous scientific studies on the topic, and it's unclear if the treatments' perceived benefits could be due to the placebo effect, experts said. "I don't think the science of whether it works is really solved," said Dr. Brent Bauer, director of the Mayo Clinic Complementary and I