Michael Phelps is seen with red cupping marks as he competes. Photo: Reuters

Five things you should know about cupping, Chinese medicine therapy on view in Rio

American swimmer Michael Phelps and gymnast Alexander Naddour have been spotted with the tell-tale red marks at the Olympics – but what is cupping? Is it safe? Does it work?

Topic |   Traditional Chinese medicine (TCM)

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Michael Phelps is seen with red cupping marks as he competes. Photo: Reuters
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