Michael Phelps continues to dominate in the pool at the Rio Olympics, racking up even more medals but the talk has turned to the bruises on his skin and the bodies of other athletes competing at the games. They come from a technique called cupping.
(NEWSCHANNEL 3) - Michael Phelps continues to dominate in the pool at the Rio Olympics, racking up even...
Local massage therapist explains cupping - WWMT-TV