Warning: The video below is a bloody mess ... and not for the faint of heart! 

This may be the grossest video of Kim Kardashian we've ever seen.

On Sunday night's episode of "Kourtney & Kim Take Miami," the reality star went in to get a "blood facial" ... a very bizarre procedure that supposedly gives you a more youthful look.

In the end, Kim was left screaming in pain ... and more covered in blood than an extra from the "Evil Dead" remake.

Check out the reallllly weird video above. Is this something you'd ever try to keep your face looking young? Sound off below.

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