Watch | Cupping therapy makes the rounds at the Olympics

The dark, round splotches that attracted attention at the Olympic games in Rio are from cupping. Cupping is an ancient healing treatment. Its a therapy where heated cups are placed on the body which creates suction. This suction stimulates blood flow in the muscle layer which helps in treating inflammation and helps the muscles to move freely. However, many are skeptical of the benefits of cupping as it's not scientifically proven but those getting this therapy are quite satisfied with it. While the effects of cupping are disputed, U.S. Olympic swimmer Michael Phelps did win his 19 Olympic gold medal, but individual results may vary.