If the sight of blood makes you sick ... it's probably too late.
Here's UFC star Khabib Nurmagomedov bleeding more than he ever has in a cage ... giving up his back to the medieval practice of wet cupping (aka "Hijama").
FYI, cupping's a form of Eastern medicine that's meant to detoxify blood ... but it's rare you see a celeb messing with Hijama -- which involves making actual incisions.
It's not the most visually appealing process, but Khabib -- a practicing Muslim -- says it's the medicine of the prophet Muhammad (according to the Google translation of his Instagram caption).
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