Hematohidrosis: It is a rare condition in which an individual is capable of sweating blood. During active hematohidrosis, capillaries that feed the sweat glands at hair follicles rupture to cause local bleeding, typically during extreme physical or emotional stress.
United States. National Institutes of Health. Genetic and Rare Diseases Information Center. "Hematohidrosis." Oct. 31, 2016. <https://rarediseases.info.nih.gov/diseases/13131/hematohidrosis>.