Here's why athletes in Rio have red dots on their backs

If you followed the Olympic Games, many athletes, especially those who compete in individual sports, have noticeable large red dots on their chests and backs. No, it's not a disease, nor an allergy, it's the traces of muscle healing, which has become very popular among competitors in Rio.

Legendary swimmer Michael Phelps appeared with the aforementioned points on Sunday, and experts at NBC explained that it was bloodletting therapy.

- Actually, bloodletting therapy involves a cup-shaped object that is attached to a pump, and then that whole apparatus for the body. Many doctors claim that this technique increases blood flow, and muscles recover much easier and faster - say experts.

Points that are the "legacy" of that therapy can stay on the body for up to two or three weeks.

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