The human reaction to the sight of blood is something that is programmed from a very young age. It means something is wrong, and needs to be addressed immediately, be it a cut, scrape, or gash on the skin, or even more serious issue like internal bleeding that manifests as blood in the mouth or other orifice. Doctors in Italy were recently faced with a patient whose bleeding was — and still is — completely unexplainable, because it comes out like sweat.
The patient, a 21-year-old woman, sweats blood. That's not an exaggeration; she literally sweats blood. The bleeding, which occurs mostly on her face and the palms of her hands, and happens when she's performing physical activity or even while sleeping. Doctors are stumped.
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